The document summarizes key aspects of the animal kingdom. It begins by defining animals and outlining two major groups - invertebrates without backbones and vertebrates with backbones. It then describes six trends in animal evolution including increasing cell specialization, development of bilateral symmetry, cephalization, body cavity formation, embryo development, and physiological systems for feeding, respiration, circulation, excretion, response, movement/support, and reproduction.
Warm Blooded Animals (homeotherms) Dominate the Terrestrial Environment, but ...ihn FreeStyle Corp.
Terrestrial environment cannot fluctuate the temperature which is suitable for homeotherm.
Most of the Homeotherm body is well insulated by feather or fur or lear of fat
This feather or fur a lear of stagnant air next to the body & reduce heat loss from underline skin or heat gain from environment.
In aquatic environment oxygen is sometimes a limiting factor an aquatic habitats but this is seldom the case in terrestrial habitats. Due to the temperature, the abundance of oxygen is variable in water. So Homeotherm try to find their suitable place in terrestrial environment.
Metabolic rate in homeotherm has no effect on body temperature, this is why most of the homeotherm find the terrestrial environment as their suitable place for living.
In most terrestrial environments there is hardly ever a a shortage of light which help homeotherm for seeking food, avoid predator & other functions.
DENTITION IN MAMMALS
The study of arrangement structure and number of types of teeth collectively is called as dentition. Teeth are present in the foetal as well as in adults of mammals, based on the presence of teeth Mammals are two types.
Edentata : In some animals teeth are absent hence called as edentate. e.g., Echidna or spiny ant-eater (Tachyglossus) the teeth are absent in all stages of life.
Dentata : Teeth are present in all mammals though a secon¬dary toothless condition is found in some mammals. Modern turtles and birds lack teeth. The adult platypus (Ornithorhynchus) bears epidermal teeth but no true teeth are present. In platypus embryonic teeth are replaced by horny epidermal teeth in adult.
Classification According to the Shape and Size of the Teeth:
Homodont:
Homodont or Isodont type of teeth is a condition where the teeth are all alike in their shape and size in the toothed whales e.g., Pinnipedians. Fishes, amphibians, reptiles and in the extinct toothed birds.
Heterodont
Heterodont condition is the usual feature in mammals, i.e. the teeth are distinguished according to their shape, size and function. The function is also different at different parts of the tooth row.
According to the Mode of Attachment of Teeth:
Thecodont : The teeth are lodged in bony sockets or alveoli of the jaw bone and capillaries and nerves enter the pulp cavity through the open tips of the hollow roots e.g., mammals, crocodiles and in some fishes.
Acrodont: The teeth are fused to the surface of the underlying jawbone. They have no roots and are attached to the edge of the jawbone by fibrous membrane e.g., fishes, amphibians and some reptiles.
Pleurodont:
The teeth are attached to the inner-side of the jawbone. The tooth touches the bone only with the outer surface of its root. In acrodont and pleurodont types of dentition, there are no roots, and nerves and blood vessels do not enter the pulp cavity at the base, e.g., Necturus (Amphibia) and some reptiles.
According to the Succession or Replace¬ment of Teeth:
paramecium is a microscopic organism. it is an protozoan that comes under ciliates. they are even visible under naked eyes. Paramecium are unicellular organism they lives in aquatic environment. they are used as live feed for fishes.
Warm Blooded Animals (homeotherms) Dominate the Terrestrial Environment, but ...ihn FreeStyle Corp.
Terrestrial environment cannot fluctuate the temperature which is suitable for homeotherm.
Most of the Homeotherm body is well insulated by feather or fur or lear of fat
This feather or fur a lear of stagnant air next to the body & reduce heat loss from underline skin or heat gain from environment.
In aquatic environment oxygen is sometimes a limiting factor an aquatic habitats but this is seldom the case in terrestrial habitats. Due to the temperature, the abundance of oxygen is variable in water. So Homeotherm try to find their suitable place in terrestrial environment.
Metabolic rate in homeotherm has no effect on body temperature, this is why most of the homeotherm find the terrestrial environment as their suitable place for living.
In most terrestrial environments there is hardly ever a a shortage of light which help homeotherm for seeking food, avoid predator & other functions.
DENTITION IN MAMMALS
The study of arrangement structure and number of types of teeth collectively is called as dentition. Teeth are present in the foetal as well as in adults of mammals, based on the presence of teeth Mammals are two types.
Edentata : In some animals teeth are absent hence called as edentate. e.g., Echidna or spiny ant-eater (Tachyglossus) the teeth are absent in all stages of life.
Dentata : Teeth are present in all mammals though a secon¬dary toothless condition is found in some mammals. Modern turtles and birds lack teeth. The adult platypus (Ornithorhynchus) bears epidermal teeth but no true teeth are present. In platypus embryonic teeth are replaced by horny epidermal teeth in adult.
Classification According to the Shape and Size of the Teeth:
Homodont:
Homodont or Isodont type of teeth is a condition where the teeth are all alike in their shape and size in the toothed whales e.g., Pinnipedians. Fishes, amphibians, reptiles and in the extinct toothed birds.
Heterodont
Heterodont condition is the usual feature in mammals, i.e. the teeth are distinguished according to their shape, size and function. The function is also different at different parts of the tooth row.
According to the Mode of Attachment of Teeth:
Thecodont : The teeth are lodged in bony sockets or alveoli of the jaw bone and capillaries and nerves enter the pulp cavity through the open tips of the hollow roots e.g., mammals, crocodiles and in some fishes.
Acrodont: The teeth are fused to the surface of the underlying jawbone. They have no roots and are attached to the edge of the jawbone by fibrous membrane e.g., fishes, amphibians and some reptiles.
Pleurodont:
The teeth are attached to the inner-side of the jawbone. The tooth touches the bone only with the outer surface of its root. In acrodont and pleurodont types of dentition, there are no roots, and nerves and blood vessels do not enter the pulp cavity at the base, e.g., Necturus (Amphibia) and some reptiles.
According to the Succession or Replace¬ment of Teeth:
paramecium is a microscopic organism. it is an protozoan that comes under ciliates. they are even visible under naked eyes. Paramecium are unicellular organism they lives in aquatic environment. they are used as live feed for fishes.
Young Tom Selleck: A Journey Through His Early Years and Rise to Stardomgreendigital
Introduction
When one thinks of Hollywood legends, Tom Selleck is a name that comes to mind. Known for his charming smile, rugged good looks. and the iconic mustache that has become synonymous with his persona. Tom Selleck has had a prolific career spanning decades. But, the journey of young Tom Selleck, from his early years to becoming a household name. is a story filled with determination, talent, and a touch of luck. This article delves into young Tom Selleck's life, background, early struggles. and pivotal moments that led to his rise in Hollywood.
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Early Life and Background
Family Roots and Childhood
Thomas William Selleck was born in Detroit, Michigan, on January 29, 1945. He was the second of four children in a close-knit family. His father, Robert Dean Selleck, was a real estate investor and executive. while his mother, Martha Selleck, was a homemaker. The Selleck family relocated to Sherman Oaks, California. when Tom was a child, setting the stage for his future in the entertainment industry.
Education and Early Interests
Growing up, young Tom Selleck was an active and athletic child. He attended Grant High School in Van Nuys, California. where he excelled in sports, particularly basketball. His tall and athletic build made him a standout player, and he earned a basketball scholarship to the University of Southern California (U.S.C.). While at U.S.C., Selleck studied business administration. but his interests shifted toward acting.
Discovery of Acting Passion
Tom Selleck's journey into acting was serendipitous. During his time at U.S.C., a drama coach encouraged him to try acting. This nudge led him to join the Hills Playhouse, where he began honing his craft. Transitioning from an aspiring athlete to an actor took time. but young Tom Selleck became drawn to the performance world.
Early Career Struggles
Breaking Into the Industry
The path to stardom was a challenging one for young Tom Selleck. Like many aspiring actors, he faced many rejections and struggled to find steady work. A series of minor roles and guest appearances on television shows marked his early career. In 1965, he debuted on the syndicated show "The Dating Game." which gave him some exposure but did not lead to immediate success.
The Commercial Breakthrough
During the late 1960s and early 1970s, Selleck began appearing in television commercials. His rugged good looks and charismatic presence made him a popular brand choice. He starred in advertisements for Pepsi-Cola, Revlon, and Close-Up toothpaste. These commercials provided financial stability and helped him gain visibility in the industry.
Struggling Actor in Hollywood
Despite his success in commercials. breaking into large acting roles remained a challenge for young Tom Selleck. He auditioned and took on small parts in T.V. shows and movies. Some of his early television appearances included roles in popular series like Lancer, The F.B.I., and Bracken's World. But, it would take a
Skeem Saam in June 2024 available on ForumIsaac More
Monday, June 3, 2024 - Episode 241: Sergeant Rathebe nabs a top scammer in Turfloop. Meikie is furious at her uncle's reaction to the truth about Ntswaki.
Tuesday, June 4, 2024 - Episode 242: Babeile uncovers the truth behind Rathebe’s latest actions. Leeto's announcement shocks his employees, and Ntswaki’s ordeal haunts her family.
Wednesday, June 5, 2024 - Episode 243: Rathebe blocks Babeile from investigating further. Melita warns Eunice to stay clear of Mr. Kgomo.
Thursday, June 6, 2024 - Episode 244: Tbose surrenders to the police while an intruder meddles in his affairs. Rathebe's secret mission faces a setback.
Friday, June 7, 2024 - Episode 245: Rathebe’s antics reach Kganyago. Tbose dodges a bullet, but a nightmare looms. Mr. Kgomo accuses Melita of witchcraft.
Monday, June 10, 2024 - Episode 246: Ntswaki struggles on her first day back at school. Babeile is stunned by Rathebe’s romance with Bullet Mabuza.
Tuesday, June 11, 2024 - Episode 247: An unexpected turn halts Rathebe’s investigation. The press discovers Mr. Kgomo’s affair with a young employee.
Wednesday, June 12, 2024 - Episode 248: Rathebe chases a criminal, resorting to gunfire. Turf High is rife with tension and transfer threats.
Thursday, June 13, 2024 - Episode 249: Rathebe traps Kganyago. John warns Toby to stop harassing Ntswaki.
Friday, June 14, 2024 - Episode 250: Babeile is cleared to investigate Rathebe. Melita gains Mr. Kgomo’s trust, and Jacobeth devises a financial solution.
Monday, June 17, 2024 - Episode 251: Rathebe feels the pressure as Babeile closes in. Mr. Kgomo and Eunice clash. Jacobeth risks her safety in pursuit of Kganyago.
Tuesday, June 18, 2024 - Episode 252: Bullet Mabuza retaliates against Jacobeth. Pitsi inadvertently reveals his parents’ plans. Nkosi is shocked by Khwezi’s decision on LJ’s future.
Wednesday, June 19, 2024 - Episode 253: Jacobeth is ensnared in deceit. Evelyn is stressed over Toby’s case, and Letetswe reveals shocking academic results.
Thursday, June 20, 2024 - Episode 254: Elizabeth learns Jacobeth is in Mpumalanga. Kganyago's past is exposed, and Lehasa discovers his son is in KZN.
Friday, June 21, 2024 - Episode 255: Elizabeth confirms Jacobeth’s dubious activities in Mpumalanga. Rathebe lies about her relationship with Bullet, and Jacobeth faces theft accusations.
Monday, June 24, 2024 - Episode 256: Rathebe spies on Kganyago. Lehasa plans to retrieve his son from KZN, fearing what awaits.
Tuesday, June 25, 2024 - Episode 257: MaNtuli fears for Kwaito’s safety in Mpumalanga. Mr. Kgomo and Melita reconcile.
Wednesday, June 26, 2024 - Episode 258: Kganyago makes a bold escape. Elizabeth receives a shocking message from Kwaito. Mrs. Khoza defends her husband against scam accusations.
Thursday, June 27, 2024 - Episode 259: Babeile's skillful arrest changes the game. Tbose and Kwaito face a hostage crisis.
Friday, June 28, 2024 - Episode 260: Two women face the reality of being scammed. Turf is rocked by breaking
Experience the thrill of Progressive Puzzle Adventures, like Scavenger Hunt Games and Escape Room Activities combined Solve Treasure Hunt Puzzles online.
Panchayat Season 3 - Official Trailer.pdfSuleman Rana
The dearest series "Panchayat" is set to make a victorious return with its third season, and the fervor is discernible. The authority trailer, delivered on May 28, guarantees one more enamoring venture through the country heartland of India.
Jitendra Kumar keeps on sparkling as Abhishek Tripathi, the city-reared engineer who ends up functioning as the secretary of the Panchayat office in the curious town of Phulera. His nuanced depiction of a young fellow exploring the difficulties of country life while endeavoring to adjust to his new environmental factors has earned far and wide recognition.
Neena Gupta and Raghubir Yadav return as Manju Devi and Brij Bhushan Dubey, separately. Their dynamic science and immaculate acting rejuvenate the hardships of town administration. Gupta's depiction of the town Pradhan with an ever-evolving outlook, matched with Yadav's carefully prepared exhibition, adds profundity and credibility to the story.
New Difficulties and Experiences
The trailer indicates new difficulties anticipating the characters, as Abhishek keeps on wrestling with his part in the town and his yearnings for a superior future. The series has reliably offset humor with social editorial, and Season 3 looks ready to dig much more profound into the intricacies of rustic organization and self-awareness.
Watchers can hope to see a greater amount of the enchanting and particular residents who have become fan top picks. Their connections and the one of a kind cut of-life situations give a reviving and interesting portrayal of provincial India, featuring the two its appeal and its difficulties.
A Mix of Humor and Heart
One of the signs of "Panchayat" is its capacity to mix humor with sincere narrating. The trailer features minutes that guarantee to convey giggles, as well as scenes that pull at the heartstrings. This equilibrium has been a critical calculate the show's prosperity, resounding with crowds across different socioeconomics.
Creation Greatness
The creation quality remaining parts first rate, with the beautiful setting of Phulera town filling in as a scenery that upgrades the narrating. The meticulousness in portraying provincial life, joined with sharp composition and solid exhibitions, guarantees that "Panchayat" keeps on hanging out in the packed web series scene.
Expectation and Delivery
As the delivery date draws near, expectation for "Panchayat" Season 3 is at a record-breaking high. The authority trailer has previously created critical buzz, with fans enthusiastically anticipating the continuation of Abhishek Tripathi's excursion and the new undertakings that lie ahead in Phulera.
All in all, the authority trailer for "Panchayat" Season 3 recommends that watchers are in for another drawing in and engaging ride. Yet again with its charming characters, convincing story, and ideal mix of humor and show, the new season is set to enamor crowds. Write in your schedules and prepare to get back to the endearing universe of "Panchayat."
From Slave to Scourge: The Existential Choice of Django Unchained. The Philos...Rodney Thomas Jr
#SSAPhilosophy #DjangoUnchained #DjangoFreeman #ExistentialPhilosophy #Freedom #Identity #Justice #Courage #Rebellion #Transformation
Welcome to SSA Philosophy, your ultimate destination for diving deep into the profound philosophies of iconic characters from video games, movies, and TV shows. In this episode, we explore the powerful journey and existential philosophy of Django Freeman from Quentin Tarantino’s masterful film, "Django Unchained," in our video titled, "From Slave to Scourge: The Existential Choice of Django Unchained. The Philosophy of Django Freeman!"
From Slave to Scourge: The Existential Choice of Django Unchained – The Philosophy of Django Freeman!
Join me as we delve into the existential philosophy of Django Freeman, uncovering the profound lessons and timeless wisdom his character offers. Through his story, we find inspiration in the power of choice, the quest for justice, and the courage to defy oppression. Django Freeman’s philosophy is a testament to the human spirit’s unyielding drive for freedom and justice.
Don’t forget to like, comment, and subscribe to SSA Philosophy for more in-depth explorations of the philosophies behind your favorite characters. Hit the notification bell to stay updated on our latest videos. Let’s discover the principles that shape these icons and the profound lessons they offer.
Django Freeman’s story is one of the most compelling narratives of transformation and empowerment in cinema. A former slave turned relentless bounty hunter, Django’s journey is not just a physical liberation but an existential quest for identity, justice, and retribution. This video delves into the core philosophical elements that define Django’s character and the profound choices he makes throughout his journey.
Link to video: https://youtu.be/GszqrXk38qk
From the Editor's Desk: 115th Father's day Celebration - When we see Father's day in Hindu context, Nanda Baba is the most vivid figure which comes to the mind. Nanda Baba who was the foster father of Lord Krishna is known to provide love, care and affection to Lord Krishna and Balarama along with his wife Yashoda; Letter’s to the Editor: Mother's Day - Mother is a precious life for their children. Mother is life breath for her children. Mother's lap is the world happiness whose debt can never be paid.
Tom Selleck Net Worth: A Comprehensive Analysisgreendigital
Over several decades, Tom Selleck, a name synonymous with charisma. From his iconic role as Thomas Magnum in the television series "Magnum, P.I." to his enduring presence in "Blue Bloods," Selleck has captivated audiences with his versatility and charm. As a result, "Tom Selleck net worth" has become a topic of great interest among fans. and financial enthusiasts alike. This article delves deep into Tom Selleck's wealth, exploring his career, assets, endorsements. and business ventures that contribute to his impressive economic standing.
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Early Life and Career Beginnings
The Foundation of Tom Selleck's Wealth
Born on January 29, 1945, in Detroit, Michigan, Tom Selleck grew up in Sherman Oaks, California. His journey towards building a large net worth began with humble origins. , Selleck pursued a business administration degree at the University of Southern California (USC) on a basketball scholarship. But, his interest shifted towards acting. leading him to study at the Hills Playhouse under Milton Katselas.
Minor roles in television and films marked Selleck's early career. He appeared in commercials and took on small parts in T.V. series such as "The Dating Game" and "Lancer." These initial steps, although modest. laid the groundwork for his future success and the growth of Tom Selleck net worth. Breakthrough with "Magnum, P.I."
The Role that Defined Tom Selleck's Career
Tom Selleck's breakthrough came with the role of Thomas Magnum in the CBS television series "Magnum, P.I." (1980-1988). This role made him a household name and boosted his net worth. The series' popularity resulted in Selleck earning large salaries. leading to financial stability and increased recognition in Hollywood.
"Magnum P.I." garnered high ratings and critical acclaim during its run. Selleck's portrayal of the charming and resourceful private investigator resonated with audiences. making him one of the most beloved television actors of the 1980s. The success of "Magnum P.I." played a pivotal role in shaping Tom Selleck net worth, establishing him as a major star.
Film Career and Diversification
Expanding Tom Selleck's Financial Portfolio
While "Magnum, P.I." was a cornerstone of Selleck's career, he did not limit himself to television. He ventured into films, further enhancing Tom Selleck net worth. His filmography includes notable movies such as "Three Men and a Baby" (1987). which became the highest-grossing film of the year, and its sequel, "Three Men and a Little Lady" (1990). These box office successes contributed to his wealth.
Selleck's versatility allowed him to transition between genres. from comedies like "Mr. Baseball" (1992) to westerns such as "Quigley Down Under" (1990). This diversification showcased his acting range. and provided many income streams, reinforcing Tom Selleck net worth.
Television Resurgence with "Blue Bloods"
Sustaining Wealth through Consistent Success
In 2010, Tom Selleck began starring as Frank Reagan i
Scandal! Teasers June 2024 on etv Forum.co.zaIsaac More
Monday, 3 June 2024
Episode 47
A friend is compelled to expose a manipulative scheme to prevent another from making a grave mistake. In a frantic bid to save Jojo, Phakamile agrees to a meeting that unbeknownst to her, will seal her fate.
Tuesday, 4 June 2024
Episode 48
A mother, with her son's best interests at heart, finds him unready to heed her advice. Motshabi finds herself in an unmanageable situation, sinking fast like in quicksand.
Wednesday, 5 June 2024
Episode 49
A woman fabricates a diabolical lie to cover up an indiscretion. Overwhelmed by guilt, she makes a spontaneous confession that could be devastating to another heart.
Thursday, 6 June 2024
Episode 50
Linda unwittingly discloses damning information. Nhlamulo and Vuvu try to guide their friend towards the right decision.
Friday, 7 June 2024
Episode 51
Jojo's life continues to spiral out of control. Dintle weaves a web of lies to conceal that she is not as successful as everyone believes.
Monday, 10 June 2024
Episode 52
A heated confrontation between lovers leads to a devastating admission of guilt. Dintle's desperation takes a new turn, leaving her with dwindling options.
Tuesday, 11 June 2024
Episode 53
Unable to resort to violence, Taps issues a verbal threat, leaving Mdala unsettled. A sister must explain her life choices to regain her brother's trust.
Wednesday, 12 June 2024
Episode 54
Winnie makes a very troubling discovery. Taps follows through on his threat, leaving a woman reeling. Layla, oblivious to the truth, offers an incentive.
Thursday, 13 June 2024
Episode 55
A nosy relative arrives just in time to thwart a man's fatal decision. Dintle manipulates Khanyi to tug at Mo's heartstrings and get what she wants.
Friday, 14 June 2024
Episode 56
Tlhogi is shocked by Mdala's reaction following the revelation of their indiscretion. Jojo is in disbelief when the punishment for his crime is revealed.
Monday, 17 June 2024
Episode 57
A woman reprimands another to stay in her lane, leading to a damning revelation. A man decides to leave his broken life behind.
Tuesday, 18 June 2024
Episode 58
Nhlamulo learns that due to his actions, his worst fears have come true. Caiphus' extravagant promises to suppliers get him into trouble with Ndu.
Wednesday, 19 June 2024
Episode 59
A woman manages to kill two birds with one stone. Business doom looms over Chillax. A sobering incident makes a woman realize how far she's fallen.
Thursday, 20 June 2024
Episode 60
Taps' offer to help Nhlamulo comes with hidden motives. Caiphus' new ideas for Chillax have MaHilda excited. A blast from the past recognizes Dintle, not for her newfound fame.
Friday, 21 June 2024
Episode 61
Taps is hungry for revenge and finds a rope to hang Mdala with. Chillax's new job opportunity elicits mixed reactions from the public. Roommates' initial meeting starts off on the wrong foot.
Monday, 24 June 2024
Episode 62
Taps seizes new information and recruits someone on the inside. Mary's new job
240529_Teleprotection Global Market Report 2024.pdfMadhura TBRC
The teleprotection market size has grown
exponentially in recent years. It will grow from
$21.92 billion in 2023 to $28.11 billion in 2024 at a
compound annual growth rate (CAGR) of 28.2%. The
teleprotection market size is expected to see
exponential growth in the next few years. It will grow
to $70.77 billion in 2028 at a compound annual
growth rate (CAGR) of 26.0%.
Meet Crazyjamjam - A TikTok Sensation | Blog EternalBlog Eternal
Crazyjamjam, the TikTok star everyone's talking about! Uncover her secrets to success, viral trends, and more in this exclusive feature on Blog Eternal.
Source: https://blogeternal.com/celebrity/crazyjamjam-leaks/
In the vast landscape of cinema, stories have been told, retold, and reimagined in countless ways. At the heart of this narrative evolution lies the concept of a "remake". A successful remake allows us to revisit cherished tales through a fresh lens, often reflecting a different era's perspective or harnessing the power of advanced technology. Yet, the question remains, what makes a remake successful? Today, we will delve deeper into this subject, identifying the key ingredients that contribute to the success of a remake.
As a film director, I have always been awestruck by the magic of animation. Animation, a medium once considered solely for the amusement of children, has undergone a significant transformation over the years. Its evolution from a rudimentary form of entertainment to a sophisticated form of storytelling has stirred my creativity and expanded my vision, offering limitless possibilities in the realm of cinematic storytelling.
Meet Dinah Mattingly – Larry Bird’s Partner in Life and Loveget joys
Get an intimate look at Dinah Mattingly’s life alongside NBA icon Larry Bird. From their humble beginnings to their life today, discover the love and partnership that have defined their relationship.
Maximizing Your Streaming Experience with XCIPTV- Tips for 2024.pdfXtreame HDTV
In today’s digital age, streaming services have become an integral part of our entertainment lives. Among the myriad of options available, XCIPTV stands out as a premier choice for those seeking seamless, high-quality streaming. This comprehensive guide will delve into the features, benefits, and user experience of XCIPTV, illustrating why it is a top contender in the IPTV industry.
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Create a Seamless Viewing Experience with Your Own Custom OTT Player.pdfGenny Knight
As the popularity of online streaming continues to rise, the significance of providing outstanding viewing experiences cannot be emphasized enough. Tailored OTT players present a robust solution for service providers aiming to enhance their offerings and engage audiences in a competitive market. Through embracing customization, companies can craft immersive, individualized experiences that effectively hold viewers' attention, entertain them, and encourage repeat usage.
2. What is an animal?
• Multicellular
• Eukaryotic
• Heterotrophic
• No cell walls
• 95% of all animals are “invertebrates.”
3. Trends in Animal Evolution
• Our survey of the animal kingdom will
start with simple animals and move to
more complex ones.
• We will investigate “invertebrates” first
and “vertebrates” later.
• Invertebrates- animals without a
backbone
• Vertebrates- animals with a backbone
4. History of Invertebrates: Cambrian
Period a radically different
• Illustrates
picture of strange looking
invertebrate life
• Major difference was the
unique “body plans”
• Similarities with today’s
invertebrates include:
1) specialized cells, tissues,
organs present
2) body symmetry
3) segmentation
4) some type of skeleton
5) front/back
6) many types of appendages
and shells
5. Animal Phyla
• There are nine major phyla of animals…
M 1. Poriferans (sponges)
o
r 2. Cnidarians (jellyfish)
e 3. Flatworms (tapeworm)
4. Roundworms (heartworm) Invertebrates
c
o 5. Annelids (earthworm)
m 6. Mollusks (clam)
p 7. Arthropod (grasshopper)
l
e 8. Echinoderm (starfish)
x 9. Chordate (human)
8. Trends in Animal Evolution
• Complex animals tend to have…
1) Specialized cells Tissues Organs
Organ Systems
2) Bilateral Symmetry (no symmetry radial
bilateral)
3) Cephalization (head with sensory organs)
4) Body cavity called coelom (acoelomate
pseudocoelomate coelomate)
5) Complex embryonic development
9. Trend #1: Cell Specialization and
Internal Body Organization.
• The more complex the animal, the more
“specialized” its cells become.
• Cells Tissues Organs Organ system.
• Some animals have no organs- sponges
• Some animals have simple organs for
excretion and reproduction – flatworms
• Some animals have organ systems - mollusks
10. Trend #2: Body Symmetry
• With the exception to sponges, every animal
exhibits one of two types of body symmetry:
1. Radial symmetry
2. Bilateral symmetry
11. Radial Symmetry
• Imaginary plane can pass through a central axis
in any direction and body parts repeat around
center of organism’s body
12. Bilateral Symmetry
• Single plane can divide the body into two
equal halves.
• Animals with bilateral symmetry have a right
and left side, front and back, top and bottom,
and usually have segmented bodies.
13. Trend #3: Cephalization
• Animals with bilateral symmetry have a definite
head.
• Cephalization is the concentration of sense
organs and nerve cells in the anterior end (front
end) of the body.
• Animals with this trait tend to respond in more
complex ways to their environment.
14. Trend #4: Body Cavity Formation
• Most animals have a body
cavity called a “coelom.”
• Fluid-filled space between
the digestive tract and
body wall
• Think of this as the area
of your body where all of
your major organs are
located.
• Provides room for organs
to grow and expand.
• Less complex animals do
not have this area.
15. Types of Body
Cavity –
• Acoelomate
no body cavity,
3 germ layers all packed
together, gut completely
surrounded by tissues
• Pseudocoelomate –
fluid-filled cavity between
mesoderm and endoderm
(separates gut and body wall)
• Coelom –
fluid-filled cavity lined on both
sides by mesoderm, found
between muscles of body wall
and muscles around gut
16. Trend #5: Embryo Development
• In protostomes (worms, mollusks, and arthropods), blastopore
develops into mouth.
• In deuterostomes (echinoderms and chordates), blastopore develops
into anus.
• Three layers of embryonic cells (germ layers):
1. Endoderm – Develops into digestive and respiratory tracts.
2. Mesoderm – Develops into muscles, heart, sex organs, and
kidneys.
3. Ectoderm – Develops into brain, sense organs, and skin.
17.
18. Invertebrate Physiology (form and function)
• To survive, all animals must perform the same basic
tasks (feed, digest, circulate nutrients, respirate,
excrete wastes, reproduce, etc.)
• Each group of invertebrates has unique systems to
help perform some of these tasks.
• We will study a variety of these systems amongst a
variety of invertebrate groups.
19. Function #1 “Feeding and Digesting”
• All animals must feed and digest.
• Two main methods of digestion:
1. Intracellular digestion.
Food is digested inside of cells.
Sponges mainly do this.
2. Extracellular digestion
Food is broken down outside of cells in special
digestive organs.
Simpler animals have only one opening where food
enters and waste leaves (two way digestive tract).
Complex animals have two separate openings a
mouth and anus (one way digestive tract).
20. Two way vs. One way digestive
tract
Mouth/Anus
21. Function #2 “Respiration”
• All animals must exchange O2 and CO2 with
the environment.
• Structures range from gills lungs
• All respiratory organs have two basic
features:
1. Large surface area to come in contact with
air or water (the larger the better).
2. Organs must be moist (important for
diffusion of gases across cells).
22. Function #3: “Circulation”
• All cells in an animal must take in
oxygen/nutrients and give off CO2/waste.
• Simple animals do this through diffusion with
their environment.
• Complex invertebrates have hearts and blood
vessels.
• There are two types of circulatory systems:
1. Open system
2. Closed system
24. Closed Circulatory System
• Blood stays within vessels.
• Characteristic of larger,
more active animals.
• More efficient form of
circulation.
25. Function #4: “Excretion”
• All animals must control…
1. The amount of water in their cells.
2. The amount of ammonia (NH3) that builds
up in the cells due to the breakdown of
amino acids. Ammonia is poisonous to cells.
• The process of controlling these two things
varies between aquatic and terrestrial
invertebrates.
26. Excretion (cont.)
Aquatic Invertebrates Terrestrial Invertebrates
• Sponge, cnidarians, and • Can use a variety of
some worms. specialized structures to
• Excess ammonia and eliminate excess water and
water is released through waste from cells.
diffusion. • Ex.) Annelids = “Nephridia”
▫ Nephridia converts
ammonia to urine.
27. Function #5: “Response”
• Invertebrates show three trends in the
evolution of their nervous systems:
1. Centralization
2. Cephalization
3. Specialization
29. • Flatworm
• More centralized.
• More cephalized.
• More specialized.
30. • Arthropods.
• Very centralized
• Very cephalized
• Very specialized
31. Function #6: “Movement and Support”
• Most animals use muscles to move, pump blood,
and perform other life functions.
• Muscles usually work together with some kind
of skeletal system (three different types);
1. Hydrostatic skeletons – Muscles push water.
Common in cnidarians and worms.
2. Exoskeletons – Outer skeleton made of chitin.
Common in arthropods.
3. Endoskeletons – Inner skeleton. Common in
echinoderms and vertebrates.
32. Function #7: “Reproduction”
• Some animals can reproduce asexually during
part of their life.
1. Binary fission (splitting in two).
2. Budding
• Most animals reproduce sexually during at
least part of their life (requires sperm and
egg).
• Male must fertilize the female.
1. External fertilization
2. Internal fertilization