It talks about movement in birds. it also further discuss about the general characteristics of birds, body parts, flight in birds lot of diagramatic images.
- Birds evolved from reptiles and Archaeopteryx possessed both reptilian and avian features. Key avian traits include feathers, hollow lightweight bones, beaks, endothermy, and amniotic eggs.
- Birds have highly specialized organ systems for flight including strong heart and respiratory systems. Their feathers provide insulation and flight abilities.
- There are many orders of birds with varied traits like waterfowl that are aquatic, owls with keen vision and hearing, and songbirds that communicate through song.
The document discusses the aquatic adaptation of mammals. It acknowledges those who helped with the seminar topic. The contents include introduction, adaptation of aquatic mammals, modification and loss of original structures, development of new structures, types of aquatic mammals, and conclusion. It describes various anatomical modifications that aquatic mammals undergo, such as streamlined bodies, flippers, valvular nostrils, large lungs, blubber, and tail flukes to adapt to aquatic living.
Feathers evolved from scales in a deep skin layer, not as modified scales. They first provided thermoregulation before later evolving for flight. A feather develops from a dermal papilla that induces overlying epidermal cells to form a feather primordium. Various feather types include flight feathers that provide propulsion and lift, as well as covert, down, and hair-like filoplume feathers.
There are several types of flight used by different birds:
1. Gliding flight is used by waterfowl for landing and involves stationary wings and losing altitude.
2. Flapping flight generates the power for flight and is the most common, with variations in wing shapes and flapping patterns between species.
3. Soaring flight allows some birds to remain airborne without expending much energy by using updrafts and air currents, with wings remaining stationary; hawks and vultures soar by circling valleys and gaining altitude with updrafts before gliding downwind.
Bird Structure & Function (Feathers).pptxMaryam Riasat
Feathers are made of beta-keratin proteins and are the most distinctive feature of birds. They play key roles in insulation, flight, coloration and other functions. Feathers have a central rachis with barbs and barbules extending laterally. The barbules interlock in different ways to form different feather types - the plumulaceous downy region at the base for insulation and the pennaceous outer region with strong hooklets for structure. Different feather types serve different purposes like flight, swimming or display.
Comparative account of derivatives of integuments sunandakumre
the integument is the natural outer protective covering of an organism or an organ, such as its skin, husk, shell, or rind.
The cutaneous Membrane (skin) And its derivatives (Exoskeleton) are together referred to as Integuments.
Skin also includes conjunctiva Of eyeballs and the external surface of eardrums and it is directly continuous with the mucous epithelial lining of the mouth rectum, nostrils, Eyelids, and urinogenital ducts.
This document provides an overview of birds, including their:
- Adaptations for flight including feathers, lightweight skeletons, and specialized respiratory systems.
- Global distribution in most habitats.
- Varied diets and specialized beaks.
- Reproduction through shelled eggs and parental care of hatchlings.
- Complex social behaviors like mating systems, migration, and nesting.
- Birds evolved from reptiles and Archaeopteryx possessed both reptilian and avian features. Key avian traits include feathers, hollow lightweight bones, beaks, endothermy, and amniotic eggs.
- Birds have highly specialized organ systems for flight including strong heart and respiratory systems. Their feathers provide insulation and flight abilities.
- There are many orders of birds with varied traits like waterfowl that are aquatic, owls with keen vision and hearing, and songbirds that communicate through song.
The document discusses the aquatic adaptation of mammals. It acknowledges those who helped with the seminar topic. The contents include introduction, adaptation of aquatic mammals, modification and loss of original structures, development of new structures, types of aquatic mammals, and conclusion. It describes various anatomical modifications that aquatic mammals undergo, such as streamlined bodies, flippers, valvular nostrils, large lungs, blubber, and tail flukes to adapt to aquatic living.
Feathers evolved from scales in a deep skin layer, not as modified scales. They first provided thermoregulation before later evolving for flight. A feather develops from a dermal papilla that induces overlying epidermal cells to form a feather primordium. Various feather types include flight feathers that provide propulsion and lift, as well as covert, down, and hair-like filoplume feathers.
There are several types of flight used by different birds:
1. Gliding flight is used by waterfowl for landing and involves stationary wings and losing altitude.
2. Flapping flight generates the power for flight and is the most common, with variations in wing shapes and flapping patterns between species.
3. Soaring flight allows some birds to remain airborne without expending much energy by using updrafts and air currents, with wings remaining stationary; hawks and vultures soar by circling valleys and gaining altitude with updrafts before gliding downwind.
Bird Structure & Function (Feathers).pptxMaryam Riasat
Feathers are made of beta-keratin proteins and are the most distinctive feature of birds. They play key roles in insulation, flight, coloration and other functions. Feathers have a central rachis with barbs and barbules extending laterally. The barbules interlock in different ways to form different feather types - the plumulaceous downy region at the base for insulation and the pennaceous outer region with strong hooklets for structure. Different feather types serve different purposes like flight, swimming or display.
Comparative account of derivatives of integuments sunandakumre
the integument is the natural outer protective covering of an organism or an organ, such as its skin, husk, shell, or rind.
The cutaneous Membrane (skin) And its derivatives (Exoskeleton) are together referred to as Integuments.
Skin also includes conjunctiva Of eyeballs and the external surface of eardrums and it is directly continuous with the mucous epithelial lining of the mouth rectum, nostrils, Eyelids, and urinogenital ducts.
This document provides an overview of birds, including their:
- Adaptations for flight including feathers, lightweight skeletons, and specialized respiratory systems.
- Global distribution in most habitats.
- Varied diets and specialized beaks.
- Reproduction through shelled eggs and parental care of hatchlings.
- Complex social behaviors like mating systems, migration, and nesting.
The document discusses the different types of flight and perching muscles in birds. There are three types of flight muscles - pectoral muscles, accessory muscles, and tensor muscles. Pectoral muscles like the pectoralis major and minor control the downstroke and upstroke of the wings during flight. Accessory muscles like the coraco-brachialis longus and brevis help elevate or depress the wings. Tensor muscles keep the wings stretched during flight. Perching muscles allow birds to flex their toes around perches and include flexor muscles like the gastrocnemius and extensor muscles like the plantoris.
Prawn respiratory system,Types of gills,structure of gill plates,working of ...SoniaBajaj10
The respiratory system of prawns includes branchiostegites, epipodites, and eight pairs of gills, with the gills being the primary respiratory organs; the gills have a central axis containing blood channels and thin gill plates for gas exchange, and water flows through the gill chamber via scaphognathite movements, facilitating the diffusion of oxygen into the blood and carbon dioxide out.
Flight adaptation and Mechanism Of Flight in Birds.Manish Dash
This document discusses flight adaptations and the mechanism of flight in birds. It describes the key morphological adaptations birds have developed for flight including their streamlined bodies, lightweight feathers, modified forelimbs that form wings, and other adaptations. It also discusses important anatomical modifications such as their lightweight skeletons, strong breast muscles, and efficient respiratory and circulatory systems. Finally, it explains how birds generate lift through their airfoils and use a downward power stroke and upward recovery stroke of their wings to fly through flapping.
Birds build nests for various purposes like laying eggs, incubating eggs, and raising chicks. They build nests in many locations using diverse materials suited to their needs. Nests are constructed through birds' use of their beaks, feet, and bodies to carry and shape materials. Different bird species build different types of nests, such as scrapes, platforms, cups, woven structures, half cups, and tunnels, utilizing their environments and materials for protection and survival.
Parental care is common among amphibians, with 18% of salamander species and 6% of frog and toad species receiving care from both parents. Amphibians exhibit various forms of parental care including building nests, transporting tadpoles, carrying eggs attached to their bodies, and giving live birth (viviparity). In frogs, parental care involves nest building and guarding of eggs, transporting tadpoles, or carrying eggs in pouches or stomachs. In salamanders, both parents may coil around and guard eggs or exhibit viviparity by retaining young in the uterus until metamorphosis. While methods vary across the three amphibian classes, parental care helps increase offspring survival.
Birds have numerous anatomical and morphological adaptations for flight. Their bodies are lightweight yet strong, with hollow bones connected to an advanced respiratory system. Many bones are fused to provide rigidity. Their powerful flight muscles are anchored to a keeled sternum. Other adaptations include short tails for steering, highly mobile necks, and modified forelimbs that serve as wings providing lift through flapping powered by strong pectoral muscles. These numerous adaptations allow birds to harness the principles of aerodynamics and achieve sustained flight.
This document discusses the differences between neoteny and paedogenesis. Neoteny involves slowed somatic growth such that organisms remain in juvenile stages, while paedogenesis involves accelerated sexual maturity even as larvae. Neoteny can be seen in humans while paedogenesis is found in amphibians like salamanders. There are two types of neoteny - total neoteny where larvae become sexually mature but retain larval features, and partial neoteny which involves a postponed metamorphosis beyond normal periods due to environmental or physiological factors. Neoteny is viewed as an adaptive consequence of retaining larval features that may be advantageous in certain environments.
Aquatic mammals have undergone several anatomical adaptations for living in aquatic ecosystems. They include streamlined bodies, fins or flippers for propulsion, insulating blubber, and circulatory systems that optimize oxygen retention and delivery. Sensory adaptations allow them to navigate, hunt, and communicate underwater using echolocation. Over time, mammals independently colonized aquatic habitats through evolutionary changes like the development of tail flukes, dorsal fins, baleen plates, and other structures suited for an aquatic lifestyle.
Protochordates are lower chordates that lack a true skull. They are divided into three sub-phyla and display characteristics like bilateral symmetry and a notochord at some life stage. Hemichordates live solitarily or in colonies and have a proboscis, collar, and trunk. Urochordates are sessile, filter-feeding tunicates surrounded by a tunic. Cephalochordates have a notochord that extends to the head and retain their nerve cord and tail. While having little economic importance, protochordates have great phylogenetic significance as they retain chordate features and are considered the most primitive chordates closely related to the vertebrate ancestor.
The document discusses the characteristics and phylogenetic relationships of prototheria, the subclass of primitive egg-laying mammals. It notes that prototheria include monotremes like the platypus and echidna, which lay eggs but nourish their young with milk. While prototheria share some traits with reptiles like claws and an interclavicle bone, they also share traits with mammals like fur, mammary glands, and a four-chambered heart. The document outlines the anatomical features and development of prototheria in detail.
This document discusses thermoregulation in various vertebrates. It explains that animals are classified as either ectotherms, which rely on external heat sources, or endotherms, which generate internal heat. Ectotherms like fish, amphibians, and reptiles rely on behavioral and physiological adaptations to regulate temperature, while endothermic birds and mammals maintain a constant internal temperature through metabolic heat production and thermoregulatory mechanisms like sweating, vasodilation, insulation, and shivering. The document provides examples of temperature regulation strategies across different vertebrate groups.
This document provides an overview of the phylum Echinodermata. Some key points:
- Echinodermata are exclusively marine and radially symmetrical as adults, though larvae are bilaterally symmetrical. They include sea stars, sea urchins, sea cucumbers, etc.
- They have a calcareous endoskeleton and a water vascular system used for locomotion, feeding, and respiration.
- Reproduction is sexual but fertilization occurs externally. Development involves a free-swimming larval stage. Many can regenerate lost parts.
Cnidaria and Ctenophora are two phyla of diploblastic aquatic animals. Cnidaria include jellyfish, corals, and anemones and have stinging cells called nematocysts. They have a polyp and medusa life cycle stage. Ctenophora, also known as comb jellies, have adhesive cells rather than nematocysts. They only have a medusa stage. Both phyla have radial or biradial symmetry and a simple digestive system. Ctenophora reproduce quickly and are important predators in marine ecosystems.
Birds evolved definitive modern features during the Cretaceous period, as shown by fossils from this era that bridge the gap between Archaeopteryx and contemporary birds. Early Cretaceous birds like Confuciusornis and Jeholornis had intermediate characteristics, with Confuciusornis having a beak like modern birds and Jeholornis retaining a long tail. During this time, Enantiornithes dominated early avian evolution and showed adaptations for flight and perching, while Sinornis santensis had further modifications for flight abilities. Ornithurae also emerged in the Cretaceous with arboreal species eventually exhibiting a range of sizes and lifestyles akin to modern
There are seven categories of feathers on birds: wing feathers which are specialized for flight; tail feathers which support precision steering; contour feathers which cover the body and streamline its shape; semi-plumes which have a fluffy insulating structure; down feathers which are short and trap body heat; filoplumes which function like whiskers to sense other feathers; and bristles which may protect the face. Each feather type serves an important role such as allowing birds to fly, show off, blend in, stay warm and dry. Feathers have evolved into specialized structures for efficient flight or extreme ornamental displays.
The document discusses the origin and evolution of mammals. It describes two main theories for the ancestry of mammals - through amphibians or reptiles. While amphibian ancestry was proposed, reptilian ancestry is now widely accepted based on fossil evidence. Many characteristics of early mammal-like reptiles called therapsids were mammalian. True mammals first appeared in the Jurassic period but remained small until after the extinction of dinosaurs. When ecological niches opened up in the Cenozoic era, mammals underwent adaptive radiations into various forms through modifications of limbs, teeth and other features for different habitats like trees, ground, burrows, water and air. Convergent evolution also led to similarities between unrelated mammals adapting to the same nic
The document provides information about a zoology course on animal form and function. The course covers topics like nutrition, digestion, temperature regulation, reproduction and development. It includes both theory and practical components. The practicals involve the study of various organ systems through dissection, models and slides. The document also discusses in detail concepts of nutrition, digestion and the diversity of digestive structures found across different animal groups including invertebrates and vertebrates.
A basic look at how animals move in their environments. Arthropods, Chordates, and Cephalopods have all adapted certain characteristics that allow them to move freely in their environment. We review the structures and abilities that make these animals successful whether it be wing design, jet propulsion, or a hydraulic mechanism, to capture prey, make love, or evade predators.
1. Charles Darwin published On the Origin of Species in 1859 which helped establish modern evolutionary theory and Archaeopteryx was identified as an early bird.
2. Theropod dinosaurs were bipedal and had many avian characteristics like wishbones which helped evolve into modern birds. The evolution of feathers allowed for flight.
3. Birds have many adaptations for flight like wing shape, feather structure, strong pectoral muscles, and high metabolisms which allow for sustained flapping.
The document discusses the different types of flight and perching muscles in birds. There are three types of flight muscles - pectoral muscles, accessory muscles, and tensor muscles. Pectoral muscles like the pectoralis major and minor control the downstroke and upstroke of the wings during flight. Accessory muscles like the coraco-brachialis longus and brevis help elevate or depress the wings. Tensor muscles keep the wings stretched during flight. Perching muscles allow birds to flex their toes around perches and include flexor muscles like the gastrocnemius and extensor muscles like the plantoris.
Prawn respiratory system,Types of gills,structure of gill plates,working of ...SoniaBajaj10
The respiratory system of prawns includes branchiostegites, epipodites, and eight pairs of gills, with the gills being the primary respiratory organs; the gills have a central axis containing blood channels and thin gill plates for gas exchange, and water flows through the gill chamber via scaphognathite movements, facilitating the diffusion of oxygen into the blood and carbon dioxide out.
Flight adaptation and Mechanism Of Flight in Birds.Manish Dash
This document discusses flight adaptations and the mechanism of flight in birds. It describes the key morphological adaptations birds have developed for flight including their streamlined bodies, lightweight feathers, modified forelimbs that form wings, and other adaptations. It also discusses important anatomical modifications such as their lightweight skeletons, strong breast muscles, and efficient respiratory and circulatory systems. Finally, it explains how birds generate lift through their airfoils and use a downward power stroke and upward recovery stroke of their wings to fly through flapping.
Birds build nests for various purposes like laying eggs, incubating eggs, and raising chicks. They build nests in many locations using diverse materials suited to their needs. Nests are constructed through birds' use of their beaks, feet, and bodies to carry and shape materials. Different bird species build different types of nests, such as scrapes, platforms, cups, woven structures, half cups, and tunnels, utilizing their environments and materials for protection and survival.
Parental care is common among amphibians, with 18% of salamander species and 6% of frog and toad species receiving care from both parents. Amphibians exhibit various forms of parental care including building nests, transporting tadpoles, carrying eggs attached to their bodies, and giving live birth (viviparity). In frogs, parental care involves nest building and guarding of eggs, transporting tadpoles, or carrying eggs in pouches or stomachs. In salamanders, both parents may coil around and guard eggs or exhibit viviparity by retaining young in the uterus until metamorphosis. While methods vary across the three amphibian classes, parental care helps increase offspring survival.
Birds have numerous anatomical and morphological adaptations for flight. Their bodies are lightweight yet strong, with hollow bones connected to an advanced respiratory system. Many bones are fused to provide rigidity. Their powerful flight muscles are anchored to a keeled sternum. Other adaptations include short tails for steering, highly mobile necks, and modified forelimbs that serve as wings providing lift through flapping powered by strong pectoral muscles. These numerous adaptations allow birds to harness the principles of aerodynamics and achieve sustained flight.
This document discusses the differences between neoteny and paedogenesis. Neoteny involves slowed somatic growth such that organisms remain in juvenile stages, while paedogenesis involves accelerated sexual maturity even as larvae. Neoteny can be seen in humans while paedogenesis is found in amphibians like salamanders. There are two types of neoteny - total neoteny where larvae become sexually mature but retain larval features, and partial neoteny which involves a postponed metamorphosis beyond normal periods due to environmental or physiological factors. Neoteny is viewed as an adaptive consequence of retaining larval features that may be advantageous in certain environments.
Aquatic mammals have undergone several anatomical adaptations for living in aquatic ecosystems. They include streamlined bodies, fins or flippers for propulsion, insulating blubber, and circulatory systems that optimize oxygen retention and delivery. Sensory adaptations allow them to navigate, hunt, and communicate underwater using echolocation. Over time, mammals independently colonized aquatic habitats through evolutionary changes like the development of tail flukes, dorsal fins, baleen plates, and other structures suited for an aquatic lifestyle.
Protochordates are lower chordates that lack a true skull. They are divided into three sub-phyla and display characteristics like bilateral symmetry and a notochord at some life stage. Hemichordates live solitarily or in colonies and have a proboscis, collar, and trunk. Urochordates are sessile, filter-feeding tunicates surrounded by a tunic. Cephalochordates have a notochord that extends to the head and retain their nerve cord and tail. While having little economic importance, protochordates have great phylogenetic significance as they retain chordate features and are considered the most primitive chordates closely related to the vertebrate ancestor.
The document discusses the characteristics and phylogenetic relationships of prototheria, the subclass of primitive egg-laying mammals. It notes that prototheria include monotremes like the platypus and echidna, which lay eggs but nourish their young with milk. While prototheria share some traits with reptiles like claws and an interclavicle bone, they also share traits with mammals like fur, mammary glands, and a four-chambered heart. The document outlines the anatomical features and development of prototheria in detail.
This document discusses thermoregulation in various vertebrates. It explains that animals are classified as either ectotherms, which rely on external heat sources, or endotherms, which generate internal heat. Ectotherms like fish, amphibians, and reptiles rely on behavioral and physiological adaptations to regulate temperature, while endothermic birds and mammals maintain a constant internal temperature through metabolic heat production and thermoregulatory mechanisms like sweating, vasodilation, insulation, and shivering. The document provides examples of temperature regulation strategies across different vertebrate groups.
This document provides an overview of the phylum Echinodermata. Some key points:
- Echinodermata are exclusively marine and radially symmetrical as adults, though larvae are bilaterally symmetrical. They include sea stars, sea urchins, sea cucumbers, etc.
- They have a calcareous endoskeleton and a water vascular system used for locomotion, feeding, and respiration.
- Reproduction is sexual but fertilization occurs externally. Development involves a free-swimming larval stage. Many can regenerate lost parts.
Cnidaria and Ctenophora are two phyla of diploblastic aquatic animals. Cnidaria include jellyfish, corals, and anemones and have stinging cells called nematocysts. They have a polyp and medusa life cycle stage. Ctenophora, also known as comb jellies, have adhesive cells rather than nematocysts. They only have a medusa stage. Both phyla have radial or biradial symmetry and a simple digestive system. Ctenophora reproduce quickly and are important predators in marine ecosystems.
Birds evolved definitive modern features during the Cretaceous period, as shown by fossils from this era that bridge the gap between Archaeopteryx and contemporary birds. Early Cretaceous birds like Confuciusornis and Jeholornis had intermediate characteristics, with Confuciusornis having a beak like modern birds and Jeholornis retaining a long tail. During this time, Enantiornithes dominated early avian evolution and showed adaptations for flight and perching, while Sinornis santensis had further modifications for flight abilities. Ornithurae also emerged in the Cretaceous with arboreal species eventually exhibiting a range of sizes and lifestyles akin to modern
There are seven categories of feathers on birds: wing feathers which are specialized for flight; tail feathers which support precision steering; contour feathers which cover the body and streamline its shape; semi-plumes which have a fluffy insulating structure; down feathers which are short and trap body heat; filoplumes which function like whiskers to sense other feathers; and bristles which may protect the face. Each feather type serves an important role such as allowing birds to fly, show off, blend in, stay warm and dry. Feathers have evolved into specialized structures for efficient flight or extreme ornamental displays.
The document discusses the origin and evolution of mammals. It describes two main theories for the ancestry of mammals - through amphibians or reptiles. While amphibian ancestry was proposed, reptilian ancestry is now widely accepted based on fossil evidence. Many characteristics of early mammal-like reptiles called therapsids were mammalian. True mammals first appeared in the Jurassic period but remained small until after the extinction of dinosaurs. When ecological niches opened up in the Cenozoic era, mammals underwent adaptive radiations into various forms through modifications of limbs, teeth and other features for different habitats like trees, ground, burrows, water and air. Convergent evolution also led to similarities between unrelated mammals adapting to the same nic
The document provides information about a zoology course on animal form and function. The course covers topics like nutrition, digestion, temperature regulation, reproduction and development. It includes both theory and practical components. The practicals involve the study of various organ systems through dissection, models and slides. The document also discusses in detail concepts of nutrition, digestion and the diversity of digestive structures found across different animal groups including invertebrates and vertebrates.
A basic look at how animals move in their environments. Arthropods, Chordates, and Cephalopods have all adapted certain characteristics that allow them to move freely in their environment. We review the structures and abilities that make these animals successful whether it be wing design, jet propulsion, or a hydraulic mechanism, to capture prey, make love, or evade predators.
1. Charles Darwin published On the Origin of Species in 1859 which helped establish modern evolutionary theory and Archaeopteryx was identified as an early bird.
2. Theropod dinosaurs were bipedal and had many avian characteristics like wishbones which helped evolve into modern birds. The evolution of feathers allowed for flight.
3. Birds have many adaptations for flight like wing shape, feather structure, strong pectoral muscles, and high metabolisms which allow for sustained flapping.
This document discusses the flight adaptations in birds. It describes how birds have undergone morphological, anatomical, and physiological changes to enable aerial locomotion. Key adaptations include streamlined bodies, feathers that provide lift and insulation, lightweight skeletons with air sacs and pneumatic bones, powerful flight muscles, and high metabolic and respiratory rates. These many adaptations allow birds to exploit aerial habitats and migrate over long distances.
Birds are feathered, winged animals that evolved from extinct reptiles. They have several adaptations for flight including lightweight bones, strong chest muscles and aerodynamic feathers. Birds maintain a constant high internal temperature through high metabolisms and efficient respiratory, circulatory and digestive systems. Their feeding process involves using a muscular gizzard to break down food and a crop to store and moisten it.
Birds have several anatomical adaptations that make flight possible. Their lightweight skeletons include thin, hollow bones and extensive bone fusion. Other adaptations that reduce weight include lightweight feathers, lack of teeth and jaws, small reproductive organs except during breeding season, and excretion of uric acid instead of watery waste. Their powerful respiratory and circulatory systems include a four-chambered heart, high blood glucose, and an efficient lung system connected to air sacs. Wings formed from modified forelimbs and specialized flight muscles also enable avian flight.
Through the process of evolution, few species of reptiles were transformed into modern birds.
This ppt describes about the similarities between reptiles and modern birds.
This document discusses the key characteristics of birds. It describes how feathers help birds stay warm and dry and enable flight. It explains the processes of preening and molting. It details the two main types of feathers, down and contour feathers. It discusses birds' fast digestion, ability to fly, raising of baby birds, and different kinds of birds such as flightless, water, perching, and birds of prey.
Modern birds evolved from theropod dinosaurs in the Jurassic period. They are characterized by feathers, a lightweight skeleton adapted for flight, and other avian adaptations like a beak without teeth. There are over 8,600 living bird species that range greatly in size. Birds have evolved many adaptations for flight including hollow bones, a breastbone with a keel to anchor flight muscles, and modified wings from forelimbs that support feathers enabling flight. Their senses of vision and hearing are highly adapted for flight and foraging.
This document describes a proposed human-powered ornithopter, or flying vehicle that uses flapping wings for propulsion and lift. The ornithopter would be powered by the pilot pedaling, with the pedal motion transmitted to the wings via a gear mechanism. A miniature prototype would be built and tested to evaluate thrust, lift, and weight limits. The prototype would mimic the flapping wing flight of the dragonfly, which can independently control each of its four wings. If the prototype demonstrates positive flight characteristics, a full-scale human-powered ornithopter may be developed using the dragonfly's efficient flapping wing mechanism.
2Biomechanics of Flight Jewell Schock Museum of Natural Hist.docxgilbertkpeters11344
2
Biomechanics of Flight
Jewell Schock Museum of Natural History
Bird Name (Lesser Yellowlegs)
There are three main forces that act on flying animals, namely drag, lift and thrust. Birds use a combination of strategies while moving in the air such that they are able to manipulate the forces acting on them to their advantage. The strategies, mostly used are flight, soaring, gliding and parachuting.
Flight
Birds have streamlined bodies to minimize drag forces for fast flight. This force is relative to the flight speed increasing when the speed is high therefore limits the bird’s motion. However the force is helpful when a flying animal tries to slow down. Additionally, lift is an important force that helps an animal in flight because it keeps them airborne. Birds and other flying animals normally have low weight and have the ability to flap wings quickly and move quickly to maximize lift (Hutchinson, 2005). Finally, thrust is a critical force in flight; birds have large flight muscles to produce thrust which opposes drag.
Soaring:
This is a strategy used by large animals to overcome drag forces and high weight. These animals have large wings overcome these forces. Another problem these animals face is that of thrust which increases slower than weight and drag, thus there is a limitation in the size of a flyer. Therefore, soaring is best for these animals which have a low wing loading, since it is energetically efficient and involves very little wing flapping.
Parachuting and Gliding
These are modes, mostly used by vertebrates as modes of aerial locomotion with most parachuting when airborne and using other means of locomotion when they are on the ground. Gliding is partly a form of parachuting whereby animals produce lift forces by an airfoil-type membrane. Most of the gliders are now extinct with only bats known to have evolved from its gliding vertebrate ancestors (Hutchinson, 2005).
General Description
The Lesser Yellowlegs (Tringa flavipes) is a medium-sized, slender, long-legged shorebird measuring 27 cm similar in appearance to the Greater Yellowlegs, which is relatively larger. The bird derives its name from its brightly colored legs. Tringa flavipes has a long neck and a straight, sharp-pointed slightly upturned bill. The bird’s tail and rump are white (Dewey, 2009).
Habitat
Tringa flavipes breed in the open in boreal forest region between Alaska and Quebec in the far north. They build nests on the ground in clearings near ponds. The species is found on coasts, lakeshores, mudflats and in the marshes during migration and winter. In comparison to the closely related, Greater Yellowlegs, which are typically found on extensive mudflats, Tringa flavipes are normally found in more secure areas, in smaller ponds. Additionally, they nest in drier protected areas in comparison with their larger counterparts.
Diet
The bird’s main diet consist of insects during the breeding season, and small fish and crustaceans during the rest of the .
This document discusses the key characteristics of birds. It notes that birds are endothermic, having feathers, wings, and a lightweight skeleton adapted for flight. Their fast metabolism allows efficient digestion to fuel flight and maintain a high body temperature of 40-44 degrees Celsius. Feathers insulate birds and flight requires adaptations like a strong breastbone and fused collarbone. A bird's beak and feet reflect its diet and habitat, with different shapes for perching, wading, or catching prey.
This document discusses the 10 unifying themes of life science:
1) Biological systems - how parts of a system work together.
2) Cellular basis of life - all organisms are made of cells that work together.
3) Structure and function - an organism's structure determines its function.
4) Reproduction and inheritance - offspring inherit genes from parents.
5) Environmental interactions - organisms interact with their environment.
6) Energy and life - all life requires energy from food or sunlight.
7) Regulation - organisms regulate internal conditions.
8) Evolution and diversity - evolution explains changes in life over time.
9) Scientific inquiry - asking questions and doing experiments to find answers.
Birds have feathers that help them fly and stay warm. They preen and molt feathers regularly. Birds have fast digestion and eat high protein foods like seeds and insects since they lack teeth. Their light skeletons and powerful muscles allow flight through lift generated by air moving over wings. Birds build nests and care for young through brooding or by having precocial or altricial chicks. There are many kinds of birds including flightless, water, perching, and birds of prey.
Bird adaptations are key to their survival. Their feathers provide insulation, protection from UV rays, and help with waterproofing. Feather color also aids camouflage and sexual display. Bird wings and beaks have evolved different shapes suited to various environments and diets. Wing shapes like long and pointed aid gliding, while short and wide allow quick takeoffs. These adaptations give birds advantages for tasks like soaring, flying long distances, or grabbing food.
This document discusses the evolution of birds from reptiles. It notes that birds are classified as Aves and have adaptations for flight like wings, feathers, and airspaces in bones. Archaeopteryx is identified as an important early bird that lived 150 million years ago - it had feathers but also claws and a long tail, indicating its reptilian ancestry. The document then discusses how early birds may have evolved flight through gliding and using wings to capture insects before full flight developed. Transitional fossils like Archaeopteryx provide evidence of the evolution between reptiles and modern avian traits.
This document provides an overview of the common structures seen during diagnosis and identification of flies. It discusses the basic body structures of flies including the head, thorax, abdomen, legs, wings, mouthparts, and antennae. Key details about common fly families such as Culicidae, Simuliidae, Ceratopogonidae, Tabanidae, and Glossinidae are summarized, including morphological features, biology, life cycles, and their importance as vectors of diseases in animals.
This document summarizes the structural and functional adaptations of birds for aerial life. It discusses both morphological and anatomical adaptations. Morphological adaptations include a compact body, feathers, winged forelimbs, a short tail, beak, mobile neck/head, and bipedal locomotion. Anatomical adaptations include large flight muscles, respiratory and circulatory systems adapted for flight, high metabolism and endothermy, specialized senses, and reproductive and excretory systems that reduce body weight. Overall, birds have evolved numerous internal and external modifications that enable sustained flight.
Birds are classified in the class Aves. They have bilateral symmetry and evolved from dinosaurs over 250 million years ago. Key shared characteristics with other animals include feathers, a four-chambered heart, large brains, and wings that allow for gliding and flapping flight. Birds reproduce through internal fertilization and lay hard-shelled eggs. Examples provided include the Indian peafowl, American flamingo, and ostrich.
Birds evolved from archosaurian reptiles over 140 million years ago. While birds and reptiles share some similarities like scales on feet and ear structures, birds differ in being warm-blooded and having modified skeletons for flight including hollow bones. The earliest known bird, Archaeopteryx, retained some reptilian traits but had feathers and wings adapted for gliding. Modern bird skeletons are highly specialized for flight through modifications like fused bones that reduce weight and a keeled sternum anchoring strong flight muscles. While most birds fly, some like ostriches are flightless with reduced wings and keels due to island evolution without predators.
Meiosis is a type of cell division that produces gametes, such as sperm and egg cells, with half the normal number of chromosomes. It involves two rounds of division called Meiosis I and Meiosis II. In Meiosis I, homologous chromosomes pair and crossover can occur, followed by the separation of homologous chromosomes into daughter cells. Meiosis II then separates the sister chromatids, resulting in four haploid daughter cells each with a single set of chromosomes. Meiosis ensures genetic variation between offspring and is essential for sexual reproduction in eukaryotes.
Cell division is the process by which a parent cell divides into two or more daughter cells. There are three main types of cell division: mitosis, meiosis, and amitosis. Mitosis is a process of nuclear division that results in two daughter cells with identical chromosomes to the parent cell. Meiosis involves two cell divisions and produces four daughter cells each with half the number of chromosomes of the original parent cell. Amitosis is direct cell division without chromosomes separating. The main functions of cell division are reproduction, growth and repair, and gamete formation. The cell cycle is the series of events in a cell leading to division, consisting of interphase and the mitotic phase involving prophase, metaphase, anaph
The document discusses gender responsive approaches in school curriculum. It emphasizes the need to support girls' education, empower girls with self-confidence and decision making skills, and train the school community in reproductive health, HIV/AIDS, and guidance and counseling. The document also discusses gender bias and discrimination in education, citing different causes such as men dominating mentality, lack of strong protest by women, social and religious beliefs, and physical factors. It notes that gender discrimination especially affects women and can have disastrous outcomes for a country.
GALLOWAY’S SYSTEM OF INTERACTION ANALYSIS.pdfBeulahJayarani
It discuss about Galloway's system of interaction analysis in details. It also explains what is interaction, analysis, class room interaction, importance of interaction analysis, Category wise verbal & non-verbal behaviour, rules and regulations, advantages and disadvantages of it.
It discuss on safety and first aid in schools, home & play field. It also discuss on the qualities & responsibilities required for the first aider
1. TO SAVE LIFE
• 2. TO PREVENT FUTHER INJURY / To limit worsening of the situation
• 3. TO PROMOTE RECOVERY
It discuss about what is health, health education, aim, objectives, need, areas, scope, functional objectives, importance and new dimensions of health education.
The document discusses different types of animal tissues, including their structures and functions. It covers four main types of tissues - epithelial tissue, connective tissue, muscular tissue, and nervous tissue. Connective tissue is further divided into fibrous, supportive and fluid connective tissues. Specific tissues discussed in detail include areolar tissue, adipose tissue, bones, cartilage, blood, and nerves. The key roles of different tissues in the structure and functioning of the body are also summarized.
Policies and programmes of inclusive education.pdfBeulahJayarani
It discusses on what are the policies and programmes helps to combine the special students with main stream of education. It also talks about old to new policies
It discuss on what is micro teaching, different skill of micro teaching, teaching & learning, importance of stimulus & variation - meaning, components of skill of variation, need & importance, INCREASE THE RETENTTION POWER OF STUDENTS…Some factors which influence students attention…..evalution sheet
It discuss on major skill of micro teaching, what is teaching & learning. Meaning and definition of skill of non verbal cues, components of non verbal cues, 1. FACIAL EXPRESSIONS, 2.BODY MOVEMENT AND POSTURE 3. GESTURES 4. EYE CONTACT 5. TOUCH / HAPTICS & DIFFERENCE BETWEEN VERBAL & NON VERBAL COMMUNICATION, OBSERVATION CODING SHEET
This document discusses learning resources and their importance in the education process. It begins by explaining that while elementary students learn through experience and observation, higher-level students require more knowledge acquisition which is supported by learning resources. Learning resources are any devices or procedures that make teaching and learning more engaging, stimulating and effective. They help students achieve learning objectives more efficiently and remember concepts for longer. However, over-reliance on learning resources can also have limitations, such as ineffectiveness if not used properly, financial constraints, or lack of infrastructure like reliable electricity. Overall, the document promotes the strategic use of learning resources to enhance the teaching and learning experience.
Under Learning resources it discuss on science laboratory. It also discuss on Science Express, Mobile Science Lab, activities OF Mobile Science Laboratory, Virtual Lab. COMPONENTS OF VIRTUAL LAB, BENEFITS & LIMITATIONSOF VIRTUAL LABS,ROLE OF TEACHERS, Field Trip or Excursion - INTRODUCTION, benefits of field trips, Science Fair, Exhibition and Talk on Science & major activities in the science fairs
B.F. Skinner (1904-1990) chose to study behaviour through the use of what he called a Skinner box. Versions were created for rats and pigeons. It discuss about Types of behaviours - Respondent, operant,: Positive, negative, stimulus & punishment, and 6 elements also.
Glaser's Basic Teaching Model is a psychological model of teaching developed by Robert Glaser in 1962. It explains the relationship between teaching and learning through four basic components: (1) instructional objectives, (2) entering behaviors of students, (3) instructional procedures used by the teacher, and (4) performance assessments to evaluate student learning. The model assumes students have prior knowledge and the teacher guides students from their entering behaviors to achieving the instructional objectives through various teaching methods and strategies. It can be applied to any subject or grade level to systematically structure the teaching and learning process.
BRYON MASSIALS AND BENJAMIN COX SOCIAL.pdfBeulahJayarani
The social enquiry model is the outcome of the efforts of Benjamin Cox and Byron Massials. It also discuss on elements, Principles of reaction in detail
The document discusses Jerome Bruner's Concept Attainment Model, which is an instructional strategy that uses examples to lead students to identify concepts. The model has three phases: presenting examples to generate hypotheses about a concept, testing students' understanding by having them classify new examples, and analyzing their thinking process. The model is intended to teach concepts inductively and help students learn conceptual thinking skills. It provides structured examples and feedback to guide students in grouping ideas according to their shared attributes.
Current Ms word generated power point presentation covers major details about the micronuclei test. It's significance and assays to conduct it. It is used to detect the micronuclei formation inside the cells of nearly every multicellular organism. It's formation takes place during chromosomal sepration at metaphase.
Immersive Learning That Works: Research Grounding and Paths ForwardLeonel Morgado
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skills
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...Leonel Morgado
Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
The binding of cosmological structures by massless topological defectsSérgio Sacani
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
1. MOVEMENTS IN BIRDS
DR. C. BEULAH JAYARANI
M.Sc., M.A, M.Ed, M.Phil (Edn), M.Phil (ZOO), NET, Ph.D (Edn)
ASST. PROFESSOR,
LOYOLA COLLEGE OF EDUCATION, CHENNAI - 34
2. BIRDS
Birds are also
known as Aves
A group of
endothermic
vertebrate.
Birds are categorised as the
biological class Aves in Linnaean
taxonomy.
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3. • Feather filled body
• Toothless beaked jaw
• Lays hard shelled egg
• Has 4 chambered heart
• Strong yet light weight skeleton
ChaRaCTERISTICS Of BIRDS
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4. The highest bird
diversity occurs in
tropical regions.
Compared with other
vertebrates, birds
have a body plan that
shows many unusual
adaptations, mostly
to facilitate flight.
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5. The skeleton consists of very lightweight
bones.
They have large air-filled cavities (called
pneumatic cavities) which connect with the
respiratory system.
The ribs are flattened and the sternum is keeled
for the attachment of flight muscles except in
the flightless bird orders.
The forelimbs are modified into wings.
SkElETal SySTEM :
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6. Like the reptiles, birds are primarily uricotelic,
i.e, kidneys extract nitrogenous waste from
their blood stream and excrete it as uric acid
instead of urea or ammonia through the
ureters into the intestine.
Birds do not have a urinary bladder or
external urethral opening and (with exception
of the ostrich) uric acid is excreted along
with faeces as a semisolid waste.
ExCRETORy SySTEM :
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7. RESpIRaTORy SySTEMS
• Most complex respiratory systems of all
animal groups.
• Upon inhalation, 75% of the fresh air
bypasses the lungs and flows directly
into a posterior air sac which extends
from the lungs and connects with air
spaces in the bones and fills them with
air.
• The other 25% of the air goes directly into
the lungs.
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8. CIRCulaTORy SySTEMS
• Unlike in mammals, the circulating red
blood cells in birds retain their nucleus
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9. NERVOuS SySTEM
• The nervous system is large relative to the
bird's size.
• The most developed part of the brain is the
one that controls the flight-related functions,
• while the cerebellum coordinates
movement and
• The cerebrum controls behaviour patterns,
navigation, mating and nest building.
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10. fEaThERS, pluMagE, aND SCalES
Feathers are a feature characteristic of birds .
They facilitate flight, provide insulation that aids in
thermoregulation, and are used in display,
camouflage, and signalling.
The arrangement and appearance of feathers on the
body, called plumage, may vary within species by
age, social status, and sex.
Feathers require maintenance and birds preen or
groom them daily.
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11. paRTS Of ThE BIRDS :
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12. The bill is used to brush away
foreign particles and to apply
waxy secretions from the
uropygial gland; these secretions
protect the feathers' flexibility and
act as an antimicrobial agent,
inhibiting the growth of feather-
degrading bacteria .
The scales of birds are composed
of the same keratin as beaks,
claws, and spurs.
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14. • Most birds can fly, which distinguishes them from almost all other
vertebrate classes.
• Flight is the primary means of locomotion for most bird species and is
used for searching for food and for escaping from predators.
• Wing shape and size generally determine a bird's flight style and
performance; many birds combine powered, flapping flight with less
energy-intensive soaring flight.
• Wing shape and size generally determine a bird's flight style and
performance
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15. • Bird flight is one of the most complex forms of
locomotion in the animal kingdom.
• Each facet of this type of motion, including hovering,
taking off, and landing, involves many complex
movements.
• As different bird species have adapted to specific
environments, prey, predators, and other needs, they
have developed varied forms of wings and varied
forms of flight
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16. WINg
• The bird's forelimbs (the wings) are the key to flight.
• Each wing has a central vane to hit the wind, composed
of three limb bones, the humerus, ulna and radius.
• The hand, or manus, which ancestrally was composed of
five digits, is reduced to three digits (digit II, III and IV
or I, II, III depending on the scheme followed[3]), which
serves as an anchor for the primaries, one of two groups
of flight feathers responsible for the wing's air foil
shape.
• The other set of flight feathers, behind the carpal joint
on the ulna, are called the secondaries.
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17. • Take-off is one of the most energetically
demanding aspects of flight, as the bird must
generate enough airflow across the wing to create
lift.
• Small birds do this with a simple upward jump.
• That doesn't work for larger birds, which must
take a run up to generate sufficient airflow.
• Large birds take off by facing into the wind, or, if
they can, by perching on a branch or cliff so they
can just drop off into the air.
flIghT
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18. DOWNSTROkE
On the downstroke of the
wing, the feathers overlap
so that no air can get
through and the bird can
push itself along through
the air
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19. upSTROkE
• On the upstroke, the feathers twist
open .
• So air passes through, allowing the
bird to lift its wings easily .
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20. laNDINg
• The bird lands by spreading out
its wings and tail as a brake .
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