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.
The video lectures of Biology in easy way are available on youtube channel.
https://youtu.be/Qg_SXsAwMmA
Basic Information about Osmoregulation in Animals
ORIGIN OF CHORDATES
Animal kingdom is basically divided into two sub kingdoms:
Non-chordata- including animals without notochord.
Chordata- This comprising animals having notochord or chorda dorsalis.
Chordates were evolved sometime 500 million years ago during Cambrian period (invertebrates were also began to evolve in this period) .
Chamberlain (1900) pointed out that all modern chordates possess glomerular kidneys that are designed to remove excess water from body.
It is believed that Chordates have originated from invertebrates.
It is difficult to determine from which invertebrate group the chordates were developed.
Chordate ancestors were soft bodied animals. Hence they were not preserved as Fossils.
However, early fossils of chordates have all been recovered from marine sediments and even modern protochordates are all marine forms.
Also glomerular kidneys are also found in some marine forms such as myxinoids and sharks. That makes the marine origin of chordates more believable.
Chordates evolved from some deuterostome ancestor (echinoderms, hemichordates, pogonophorans etc.) as they have similarities in embryonic development, type of coelom and larval stages.
Many theories infers origin of chordates, hemichordates and echinoderms from a common ancestor.
The primitive blueprint for the heart and circulatory system emerged with the arrival of the third mesodermal germ layer in bilaterians. Since then, hearts in animals have evolved from a single layered tube to a multiple chambered heart in due course of time.
The video lectures of Biology in easy way are available on youtube channel.
https://youtu.be/Qg_SXsAwMmA
Basic Information about Osmoregulation in Animals
ORIGIN OF CHORDATES
Animal kingdom is basically divided into two sub kingdoms:
Non-chordata- including animals without notochord.
Chordata- This comprising animals having notochord or chorda dorsalis.
Chordates were evolved sometime 500 million years ago during Cambrian period (invertebrates were also began to evolve in this period) .
Chamberlain (1900) pointed out that all modern chordates possess glomerular kidneys that are designed to remove excess water from body.
It is believed that Chordates have originated from invertebrates.
It is difficult to determine from which invertebrate group the chordates were developed.
Chordate ancestors were soft bodied animals. Hence they were not preserved as Fossils.
However, early fossils of chordates have all been recovered from marine sediments and even modern protochordates are all marine forms.
Also glomerular kidneys are also found in some marine forms such as myxinoids and sharks. That makes the marine origin of chordates more believable.
Chordates evolved from some deuterostome ancestor (echinoderms, hemichordates, pogonophorans etc.) as they have similarities in embryonic development, type of coelom and larval stages.
Many theories infers origin of chordates, hemichordates and echinoderms from a common ancestor.
The primitive blueprint for the heart and circulatory system emerged with the arrival of the third mesodermal germ layer in bilaterians. Since then, hearts in animals have evolved from a single layered tube to a multiple chambered heart in due course of time.
INTRODUCTION
The term urogenital refers to something that has both urinary and genital origins. The word urogenital is used because the urinary and reproductive systems in males merge.
These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways (ex. urethra).
Kidneys and urinary ducts form the urinary system.
The Urinary system performs two important homeostatic processes like excretion and osmoregulation. This system is intimately associated both anatomically, and in terms of embryonic origin with the genital system.
The genital system includes the gonads which generate gametes and the genital ducts that serve as passages for the gametes.
Though functionally different the two organ systems the urinary and the genital system are treated together as the urino- genital system, since both develop from the same segmental blocks of trunk mesoderm or adjacent tissues and share many of the ducts.
Thus although the two systems have nothing common functionally they are closely associated in their use of common ducts and are studied under the broad heading of urinogenital system.
The function of the excretory system is crucial in considering the possible environment of the ‘vertebrate life ’. Several main functions can be attributed to all vertebrate excretory systems:
Excretion of nitrogenous waste products.
Maintaining homeostasis with regard to ions (i.e. salt balance).
Regaining valuable substances (glucose, salts, amino acids, etc.)
Maintaining a physiological osmotic value (i.e. water balance).
The excretory system is formed by a series of paired, segmental nephrons that begin with a nephrostome opening into the coelomic cavity.
A pair of glomeruli per segment, supplied by branches from the aorta, projects into the coelomic cavity close to these nephrostomes.
At a later stage of development, the glomerulus/nephrostome area becomes separated from the rest of the coelomic cavity by an epithelial fold.
The nephrons connect to a duct that is formed by caudal growth of the most anterior nephric tubules. These paired urinary ducts open near the anal region.
Parental care is any behavior pattern in which a parent invests time or energy in feeding and protecting its offspring.
Parental care is a form of altruism since this type of behaviour involves increasing the fitness of the offspring at the expense of the parents.
The evolution of parental care is beneficial as it facilitates offspring performance traits that are ultimately tied to offspring fitness.
Parental care is evolved in those organism which produce limited no. of eggs to ensure the continuity of their race.
Osmoregulation is the process of maintaining salt and water balance (osmotic balance) across membranes within the body. The fluids inside and surrounding cells are composed of water, electrolytes, and nonelectrolytes. An electrolyte is a compound that dissociates into ions when dissolved in water.
INTRODUCTION
The jaw (Upper and lower) is any opposable articulated structure at the entrance of the mouth.
It is typically used for grasping and manipulating food.
Jaw suspension means the fusion of upper jaw and lower jaw or skull for efficient biting.
There are different ways in which these attachments are attained depending upon the modifications in visceral arches in vertebrates.
In most vertebrates, the jaws are bony or cartilaginous and oppose vertically.
The vertebrate jaw is derived from the most anterior two pharyngeal arches supporting the gills, and usually bears numerous teeth.
The vertebrate jaw probably originally evolved in the Silurian period and appeared in the Placoderm fish which further diversified in the Devonian.
It is believed that the hyoid system suspends the jaw from the brain case of the skull, permitting great mobility of the jaws.
The original selective advantage offered by the jaw may not be related to feeding, but rather to increased respiration efficiency.
The jaws were used in the buccal pump (observable in modern fish and amphibians) that pumps water across the gills of fish or air into the lungs in the case of amphibians.
Over evolutionary time the more familiar use of jaws (to humans), in feeding, was selected for and became a very important function in vertebrates. Many teleost fish have substantially modified jaws for suction feeding and jaw protrusion, resulting in highly complex jaws with dozens of bones involved.
Jaw Suspension or Suspensoria:
The method by which the upper and lower jaws are suspended or attached from the chondrocranium is known as jaw suspension or suspensorium.
Amongst the visceral arches, the first (mandibular) arch consists of
= a dorsal palato pterygoquadrate bar forming the upper jaw,
= and ventral Meckel’s cartilage forms the lower jaw.
The second (hyoid) arch consists of = a dorsal hyomandibular supporting and suspending the jaws with the cranium, and a ventral hyoid.
The remaining visceral arches support the gills and are, hence, called branchial arches. Thus, splanchnocranium forms the jaws and suspends them with the chondrocranium.
Why do animals need to breathe?
Breathing is important to organisms because cells require energy (oxygen) to move, reproduce and function. Breath also expels carbon dioxide, which is a by-product of cellular processes within the bodies of animals.
Respiration is the process of releasing energy from food and this takes place inside the cells of the body.
The process of respiration involves taking in oxygen (of air) into cells, using it for releasing energy by burning food, and then eliminating the waste products (carbon dioxide and water) from the body.
Respiration is essential for life because it provides energy for carrying out all the life processes which are necessary to keep the organisms alive.
The energy produced during respiration is stored in the form of ATP (Adenosine Tri- Phosphate) molecules in the cells of the body and used by the organism as when required.
KEY POINTS
Life started in an anaerobic environment in the so called ‘primodial broth’ (a mixture of organic molecules.
Subsequently, oxygen strangely enough became an crucial factor for aerobic metabolism especially in the higher life forms.
The rise of an oxygenic environment was an important event in the diversification of life.
It evoked a dramatic shift from inefficient to sophisticated oxygen dependent oxidizing ecosystems.
Anaerobic fermentation, the metabolic process that prevailed for the first about 2 billion years of the evolution of life, was a very inefficient way of extracting energy from organic molecules. Ex: A molecule of glucose, e.g., produces only two molecules of ATP (≈ 15 kCal) compared with 36 ATP molecules (≈ 263 kCal) in oxygenic respiration.
Aerobic metabolism must have developed at a critical point when the partial pressure of oxygen rose from an initial level to one adequately high to drive it passively across the cell membrane.
Respiration is a complex and highly integrated biomechanical, physiological, and behavioral processes.
The transfer of O2 occurs through a flow of tissue barriers and compartments by diffusion down a partial pressure gradient, which drops to about zero at the mitochondrial level.
Acquisition of molecular oxygen (O2) from the external fluid media (water and air) and the discharge of carbon dioxide (CO2) into the same milieu is the primary role of respiration.
The respiratory system is a biological system consisting of specific organs and structures.
Accssory respiratiory organs in fishesaadiihussain
Gills are primary respiratory organs in fishes, Extra branchial respiration is highly useful for survival when oxygen supplied by gills is not sufficient.
Social organization and social behaviour in insectsPoojaVishnoi7
Introduction
Properties of a society
Advantages of a society
Disadvantages of a society
Social organisation and social behaviour in insects:-
1. Termites
2.Honeybees
3.Ants
4.Yellow wasp
Origin of the Lateral Line System
Lateral line is a canal along the side of a fish containing pores that open into tubes supplied with sense organs sensitive to low vibrations.
Robert H. Denison explained the origin of the lateral line system. He explained that early vertebrates had a pore-canal system in the dermis which functioned as a primitive sensory system in detecting water movement.
Through the evidences from fossils, embryology and comparative anatomy, Denison (1966) established that the inner ear is closely related to the lateral line system. He found a distinct relationship between the pore canal system and the lateral line in Osteotraci.
The inner ear and the lateral line are developed from ectodermal thickenings, called dorso-lateral placodes. These have a number of similarities, including receptors with sensory hairs, and are both innervated by fibers in the acoustico-lateral area of the brain.
The pore canal system is present and developed in Osteostraci (ostracoderm).
It is also present in Heterostraci which is another group of ostracoderms and includes early vertebrates such as lungfishes and crossopterygians.
As its presence is extensive, it is reasonable to suggest that the pore canal system was a primitive character in early vertebrates .
In transverse sections also , it is very difficult to differentiate the pore canal system from a lateral line canal.
Structure of the Lateral Line System
Epidermal structures called neuromasts form the peripheral area of the lateral line.
Neuromasts consist of two types of cells, hair cells and supporting cells.
Hair cells have an epidermal origin and each hair cell has one high kynocyle (5-10 μm) and 30 to 150 short stereocilia (2-3 μm).
The number of hair cells in each neuromast depends on its size, and they can range from dozens to thousands.
Hair cells can be oriented in two opposite directions with each hair cell surrounded by supporting cells.
At the basal part of each hair cell, there are synaptic contacts with afferent and efferent nerve fibers. Afferent fibers, transmit signals to the neural centres of the lateral line and expand at the neuromast base. The regulation of hair cells is achieved by the action of efferent fibers.
Stereocilia and kinocilium of hair cells are immersed into a cupula and are located above the surface of the sensory epithelium.
The cupula is created by a gel-like media, which is secreted by non-receptor cells of the neuromast.
c- The triceps is the prime mover and the anconeus a weak auxistant in.pdfkuldeepkumarapgsi
c. The triceps is the prime mover and the anconeus a weak auxistant in of the clbow. 1. When
hammering a nail, the (bicops brachiti/ triceps brachii) concentrically contracts on the
downswing. c. The (anteriot/posteriot) museles of the elbow are used to raise a water glass.
Museles of the Forearm, Wrist, and Hand 1. Pronator Teres a. The proximal attachment of the
pronator teres is on the epicondyle of the humerus and the distal attachment on the lateral surface
of the (nitius / ulna)). b. As its name implies, this muscle will the pivot joints of the forcarm. 2.
Flexor Carpi Radialis, Flexor Carpi Ulnaris, and Palmaris Longus a. These 3 muscles all take
their proximal attachments on the (medial/lateral) epicondyle of the humerus and teminate
distally just beyond the wrist. b. When these museles contract the hand will be pulied so as to
(extend/flex) the radiocarpal joint. c. Located between the flexor carpi radialis and flexor carpi
ulnaris is the 3. Flexor Digitorum Superficialis a. Located beneath the flexors of the wrist. Like
those muscles, this musele arises from the epicondyle of the humerus and is also anchored to the
middle portion of the (rudius / ulna) b. The tendon of the flexor digitorum superficialis divides
into ( 2/3/4 ) segments. c. These tendons inset on the (distal / medial) phalanges of the four
fingers. d. Thus far, we have noted that the muscles of the anterior forearm all have attachments
on the of the humerus and acts as (cxtensors / flexors) of the wrist and fingers. 4. (Deep Anterior
Muscles) Flexor Digitorum Profundus and Flexor Pollicus Longus a. The flexor digitorum
profundus originates on the upper end of the (radius / ulna) and its lower tendons divides into
four branches that pass to the (distal / proximal) phalanges of the four fingers. b. The obvious
function of this musele is (extension / flexion) of the fingers. c. The flexor pollicus longus arises
from the anterior surface of the (radrus/ ulna) d. When you see the term pollicis in the name of a
muscle you will know that it attaches to the thumb The flexor pollicis longus inserts on the
phalanx of the thumb. 5. Pronator Quadratus a. This four sided muscle is located on the anterior
surface of the (distal / proximal) end of the forea b. When we pronate the forearm, the pronator
teres pulls on the upper end of the radius and the pronator pulls on the lower end of that bone. c.
The musculature of the anterior forearm will (extend / flex) the wrist and fingers. d. The long
muscle that flexes the thumb is the.
Muscles of head, Muscles of face, Muscles of neck, Muscles of shoulder girdle, Muscles of upper limbs, Muscles of thorax, Diaphragm, Muscles of abdomen, Muscles of back, Muscles of perineum, Muscles of pelvis, Muscles of lower limb, Muscles of leg, Muscles of foot
INTRODUCTION
The term urogenital refers to something that has both urinary and genital origins. The word urogenital is used because the urinary and reproductive systems in males merge.
These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways (ex. urethra).
Kidneys and urinary ducts form the urinary system.
The Urinary system performs two important homeostatic processes like excretion and osmoregulation. This system is intimately associated both anatomically, and in terms of embryonic origin with the genital system.
The genital system includes the gonads which generate gametes and the genital ducts that serve as passages for the gametes.
Though functionally different the two organ systems the urinary and the genital system are treated together as the urino- genital system, since both develop from the same segmental blocks of trunk mesoderm or adjacent tissues and share many of the ducts.
Thus although the two systems have nothing common functionally they are closely associated in their use of common ducts and are studied under the broad heading of urinogenital system.
The function of the excretory system is crucial in considering the possible environment of the ‘vertebrate life ’. Several main functions can be attributed to all vertebrate excretory systems:
Excretion of nitrogenous waste products.
Maintaining homeostasis with regard to ions (i.e. salt balance).
Regaining valuable substances (glucose, salts, amino acids, etc.)
Maintaining a physiological osmotic value (i.e. water balance).
The excretory system is formed by a series of paired, segmental nephrons that begin with a nephrostome opening into the coelomic cavity.
A pair of glomeruli per segment, supplied by branches from the aorta, projects into the coelomic cavity close to these nephrostomes.
At a later stage of development, the glomerulus/nephrostome area becomes separated from the rest of the coelomic cavity by an epithelial fold.
The nephrons connect to a duct that is formed by caudal growth of the most anterior nephric tubules. These paired urinary ducts open near the anal region.
Parental care is any behavior pattern in which a parent invests time or energy in feeding and protecting its offspring.
Parental care is a form of altruism since this type of behaviour involves increasing the fitness of the offspring at the expense of the parents.
The evolution of parental care is beneficial as it facilitates offspring performance traits that are ultimately tied to offspring fitness.
Parental care is evolved in those organism which produce limited no. of eggs to ensure the continuity of their race.
Osmoregulation is the process of maintaining salt and water balance (osmotic balance) across membranes within the body. The fluids inside and surrounding cells are composed of water, electrolytes, and nonelectrolytes. An electrolyte is a compound that dissociates into ions when dissolved in water.
INTRODUCTION
The jaw (Upper and lower) is any opposable articulated structure at the entrance of the mouth.
It is typically used for grasping and manipulating food.
Jaw suspension means the fusion of upper jaw and lower jaw or skull for efficient biting.
There are different ways in which these attachments are attained depending upon the modifications in visceral arches in vertebrates.
In most vertebrates, the jaws are bony or cartilaginous and oppose vertically.
The vertebrate jaw is derived from the most anterior two pharyngeal arches supporting the gills, and usually bears numerous teeth.
The vertebrate jaw probably originally evolved in the Silurian period and appeared in the Placoderm fish which further diversified in the Devonian.
It is believed that the hyoid system suspends the jaw from the brain case of the skull, permitting great mobility of the jaws.
The original selective advantage offered by the jaw may not be related to feeding, but rather to increased respiration efficiency.
The jaws were used in the buccal pump (observable in modern fish and amphibians) that pumps water across the gills of fish or air into the lungs in the case of amphibians.
Over evolutionary time the more familiar use of jaws (to humans), in feeding, was selected for and became a very important function in vertebrates. Many teleost fish have substantially modified jaws for suction feeding and jaw protrusion, resulting in highly complex jaws with dozens of bones involved.
Jaw Suspension or Suspensoria:
The method by which the upper and lower jaws are suspended or attached from the chondrocranium is known as jaw suspension or suspensorium.
Amongst the visceral arches, the first (mandibular) arch consists of
= a dorsal palato pterygoquadrate bar forming the upper jaw,
= and ventral Meckel’s cartilage forms the lower jaw.
The second (hyoid) arch consists of = a dorsal hyomandibular supporting and suspending the jaws with the cranium, and a ventral hyoid.
The remaining visceral arches support the gills and are, hence, called branchial arches. Thus, splanchnocranium forms the jaws and suspends them with the chondrocranium.
Why do animals need to breathe?
Breathing is important to organisms because cells require energy (oxygen) to move, reproduce and function. Breath also expels carbon dioxide, which is a by-product of cellular processes within the bodies of animals.
Respiration is the process of releasing energy from food and this takes place inside the cells of the body.
The process of respiration involves taking in oxygen (of air) into cells, using it for releasing energy by burning food, and then eliminating the waste products (carbon dioxide and water) from the body.
Respiration is essential for life because it provides energy for carrying out all the life processes which are necessary to keep the organisms alive.
The energy produced during respiration is stored in the form of ATP (Adenosine Tri- Phosphate) molecules in the cells of the body and used by the organism as when required.
KEY POINTS
Life started in an anaerobic environment in the so called ‘primodial broth’ (a mixture of organic molecules.
Subsequently, oxygen strangely enough became an crucial factor for aerobic metabolism especially in the higher life forms.
The rise of an oxygenic environment was an important event in the diversification of life.
It evoked a dramatic shift from inefficient to sophisticated oxygen dependent oxidizing ecosystems.
Anaerobic fermentation, the metabolic process that prevailed for the first about 2 billion years of the evolution of life, was a very inefficient way of extracting energy from organic molecules. Ex: A molecule of glucose, e.g., produces only two molecules of ATP (≈ 15 kCal) compared with 36 ATP molecules (≈ 263 kCal) in oxygenic respiration.
Aerobic metabolism must have developed at a critical point when the partial pressure of oxygen rose from an initial level to one adequately high to drive it passively across the cell membrane.
Respiration is a complex and highly integrated biomechanical, physiological, and behavioral processes.
The transfer of O2 occurs through a flow of tissue barriers and compartments by diffusion down a partial pressure gradient, which drops to about zero at the mitochondrial level.
Acquisition of molecular oxygen (O2) from the external fluid media (water and air) and the discharge of carbon dioxide (CO2) into the same milieu is the primary role of respiration.
The respiratory system is a biological system consisting of specific organs and structures.
Accssory respiratiory organs in fishesaadiihussain
Gills are primary respiratory organs in fishes, Extra branchial respiration is highly useful for survival when oxygen supplied by gills is not sufficient.
Social organization and social behaviour in insectsPoojaVishnoi7
Introduction
Properties of a society
Advantages of a society
Disadvantages of a society
Social organisation and social behaviour in insects:-
1. Termites
2.Honeybees
3.Ants
4.Yellow wasp
Origin of the Lateral Line System
Lateral line is a canal along the side of a fish containing pores that open into tubes supplied with sense organs sensitive to low vibrations.
Robert H. Denison explained the origin of the lateral line system. He explained that early vertebrates had a pore-canal system in the dermis which functioned as a primitive sensory system in detecting water movement.
Through the evidences from fossils, embryology and comparative anatomy, Denison (1966) established that the inner ear is closely related to the lateral line system. He found a distinct relationship between the pore canal system and the lateral line in Osteotraci.
The inner ear and the lateral line are developed from ectodermal thickenings, called dorso-lateral placodes. These have a number of similarities, including receptors with sensory hairs, and are both innervated by fibers in the acoustico-lateral area of the brain.
The pore canal system is present and developed in Osteostraci (ostracoderm).
It is also present in Heterostraci which is another group of ostracoderms and includes early vertebrates such as lungfishes and crossopterygians.
As its presence is extensive, it is reasonable to suggest that the pore canal system was a primitive character in early vertebrates .
In transverse sections also , it is very difficult to differentiate the pore canal system from a lateral line canal.
Structure of the Lateral Line System
Epidermal structures called neuromasts form the peripheral area of the lateral line.
Neuromasts consist of two types of cells, hair cells and supporting cells.
Hair cells have an epidermal origin and each hair cell has one high kynocyle (5-10 μm) and 30 to 150 short stereocilia (2-3 μm).
The number of hair cells in each neuromast depends on its size, and they can range from dozens to thousands.
Hair cells can be oriented in two opposite directions with each hair cell surrounded by supporting cells.
At the basal part of each hair cell, there are synaptic contacts with afferent and efferent nerve fibers. Afferent fibers, transmit signals to the neural centres of the lateral line and expand at the neuromast base. The regulation of hair cells is achieved by the action of efferent fibers.
Stereocilia and kinocilium of hair cells are immersed into a cupula and are located above the surface of the sensory epithelium.
The cupula is created by a gel-like media, which is secreted by non-receptor cells of the neuromast.
c- The triceps is the prime mover and the anconeus a weak auxistant in.pdfkuldeepkumarapgsi
c. The triceps is the prime mover and the anconeus a weak auxistant in of the clbow. 1. When
hammering a nail, the (bicops brachiti/ triceps brachii) concentrically contracts on the
downswing. c. The (anteriot/posteriot) museles of the elbow are used to raise a water glass.
Museles of the Forearm, Wrist, and Hand 1. Pronator Teres a. The proximal attachment of the
pronator teres is on the epicondyle of the humerus and the distal attachment on the lateral surface
of the (nitius / ulna)). b. As its name implies, this muscle will the pivot joints of the forcarm. 2.
Flexor Carpi Radialis, Flexor Carpi Ulnaris, and Palmaris Longus a. These 3 muscles all take
their proximal attachments on the (medial/lateral) epicondyle of the humerus and teminate
distally just beyond the wrist. b. When these museles contract the hand will be pulied so as to
(extend/flex) the radiocarpal joint. c. Located between the flexor carpi radialis and flexor carpi
ulnaris is the 3. Flexor Digitorum Superficialis a. Located beneath the flexors of the wrist. Like
those muscles, this musele arises from the epicondyle of the humerus and is also anchored to the
middle portion of the (rudius / ulna) b. The tendon of the flexor digitorum superficialis divides
into ( 2/3/4 ) segments. c. These tendons inset on the (distal / medial) phalanges of the four
fingers. d. Thus far, we have noted that the muscles of the anterior forearm all have attachments
on the of the humerus and acts as (cxtensors / flexors) of the wrist and fingers. 4. (Deep Anterior
Muscles) Flexor Digitorum Profundus and Flexor Pollicus Longus a. The flexor digitorum
profundus originates on the upper end of the (radius / ulna) and its lower tendons divides into
four branches that pass to the (distal / proximal) phalanges of the four fingers. b. The obvious
function of this musele is (extension / flexion) of the fingers. c. The flexor pollicus longus arises
from the anterior surface of the (radrus/ ulna) d. When you see the term pollicis in the name of a
muscle you will know that it attaches to the thumb The flexor pollicis longus inserts on the
phalanx of the thumb. 5. Pronator Quadratus a. This four sided muscle is located on the anterior
surface of the (distal / proximal) end of the forea b. When we pronate the forearm, the pronator
teres pulls on the upper end of the radius and the pronator pulls on the lower end of that bone. c.
The musculature of the anterior forearm will (extend / flex) the wrist and fingers. d. The long
muscle that flexes the thumb is the.
Muscles of head, Muscles of face, Muscles of neck, Muscles of shoulder girdle, Muscles of upper limbs, Muscles of thorax, Diaphragm, Muscles of abdomen, Muscles of back, Muscles of perineum, Muscles of pelvis, Muscles of lower limb, Muscles of leg, Muscles of foot
Muscles and Topography of the Upper and Lower LimbMBBS Help
Muscles of the upper limb.
Muscles and topography of the shoulder girdle.
Muscles and topography of the upper arm.
Muscles and topography of the forearm.
Muscles and topography of the hand.
Fasciae of the upper limb.
The synovial bursae of the upper limb.
The muscles of the lower limb.
Muscles and topography of the pelvic girdle.
Muscles and topography of the thigh.
Muscles and topography of the leg.
Muscles and topography of the foot.
The synovial bursae of the lower limb.
Muscles of the axial skeleton. Pictures of the muscles, origins, insertions, actions. Does not include all the muscles we discussed in class, but includes some fun photos & side notes.
Science teaching is a complex activity that lies at the heart of the vision of science education presented in the Standards. The teaching standards provide criteria for making judgments about progress toward the vision; they describe what teachers of science at all grade levels should understand and be able to do.
Life of every organism depends on certain basic processes. Excretion is one among them. Different organisms follow different modes of excretion. In complex organisms including humans, there is a specialized system for excretion called human excretory system.
Cell Signaling is a phenomenon in which cells receive and respond to the signals or chemical messages from their internal environment or from the neighbouring cells.
Flight in bird is one of the most complex forms of locomotion in the animal kingdom. Flight in birds includes hovering, taking off and landing which involves many complex movements.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
This pdf is about the Schizophrenia.
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A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
2. What is Flight Muscle ?
The special muscles of birds which help
them to fly are called as Flight Muscles.
08-04-2019 2Archana Das
3. The muscular system in birds is highly
modified to adapt with the aerial mode
of life.
According to activities, the muscles for
flight in birds are of two types.
They are :
1. Flight Muscle : To help in flying
2.Perching Muscle : To help in perching
08-04-2019 3Archana Das
4. In birds Flight Muscle can be of three types.
They are :
Pectoral Muscles
Accessory Muscles
Tensor Muscles
Flight Muscle
08-04-2019 4Archana Das
5. The muscles of birds which maintain the upstroke &
downstroke of the wings during flight are called as
Pectoral Muscles
Pectoral Muscles
They are of two types.
1. Pectoralis major : They are paired muscles of large size with
triangular shape. They cover the whole breast of the birds and hence
called as “Breast Muscle”. They are dark red in colour and maintain the
downstroke & forward stroke of the wings.
2. Pectoralis minor : They are present on the dorsal side of the
pactoralis major and arises from the anterior part of the sternum
bone. They control the upstroke & backward stroke besides helping the
birds in quick take off.
08-04-2019 5Archana Das
6. Accessory Muscles
Besides pectoral muscles,
the accessory muscles also
help to elevate or depress
the wings during flight.
They are of three types :
1. Coraco-brachialis longus
2. Coraco-brachialis brevis
3. The biceps and triceps
08-04-2019 6Archana Das
7. 1. Coraco-brachialis longus:
It is present beneath the pectoral muscles. It arises from the
coracoid and the costal process of sternum. Its tendon is
attached to the posterior side of the head of humerus. It lowers
the hinder aspect of the wing.
2. Coraco-brachialis brevis:
Another smaller and narrow muscle is coraco-brachialis lies
in front of the longus. It also extends from girdle to humerus &
raises the hinder edge of the wing. Both the muscles rotate the
wings in the glenoid cavity.
3. The biceps and triceps :
They are the intrinsic muscles of the upper arm which
operate the elbow and perform adjustments during flight.
08-04-2019 7Archana Das
8. Tensor Muscles
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Three muscles keep the prepatagium fully stretched
when the wing is extended in flight.
They are of three types:
1. Tensor longus,
2. Tensor brevis, and
3. Tensor accessorius
10. 08-04-2019 Archana Das 10
Some large and strong muscles and tendons of
hind legs in birds have special arrangement so that a
can sit on a perch and the toes get mechanically flexed
around the perch.
Such muscles in the hind legs of a bird are called
as Perching Muscles. They are of two types :
1. Extensor Muscle
2. Flexor Muscle
Perching Muscles
11. 08-04-2019 Archana Das 11
Flexor Muscles
Flexor muscles help the birds during perching
by flexing the phalanges. They remain attached to the
tibio tarsus and knee joint.
The Flexor muscles of bird are :
1. Peroneus muscles
2. Flexor perforans
3. Ambiens
4. Gastrocnemius
13. 08-04-2019 Archana Das 13
1. Peroneus muscles: Two sets of peroneus muscles
Peroneus longus & Peronues brevis help in extension and
abduction of the tarsometatarsus
2. Flexor perforans: Four sets of flexor perforans originate
from various parts of the tibia and connect to the all
four digits of each leg.
3. Ambiens: They arise from ilium and extend down the
thigh. They provide strength to the legs during perching.
4. Gastrocnemius: This muscle is originated from the three
heads of femur, tibia and ilium. It hepls in the extension
of the tarsometatarsus.
The Flexor muscles
14. Extensor Muscles
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Attached to the tibiotarsus there are several extensor
muscles in birds. They are:
1. Plantoris: It hepls in the extension of tarsometatarsus
2. Tibialis anticus: It flexes the tarsometatarsus.
3. External digitorium longus: It serves as common extensor
of all the digits.
4. Tibialis anterior: They help in the opening of the toes in
both the legs during perching.