Classifying Animals Vertebrates Chap. 3, lesson 2, pages 51-65.
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Transcript of Classifying Animals Vertebrates Chap. 3, lesson 2, pages 51-65.
![Page 1: Classifying Animals Vertebrates Chap. 3, lesson 2, pages 51-65.](https://reader036.fdocuments.net/reader036/viewer/2022082610/56649dcf5503460f94ac4043/html5/thumbnails/1.jpg)
Classifying Animals
VertebratesChap. 3, lesson 2, pages 51-65
![Page 2: Classifying Animals Vertebrates Chap. 3, lesson 2, pages 51-65.](https://reader036.fdocuments.net/reader036/viewer/2022082610/56649dcf5503460f94ac4043/html5/thumbnails/2.jpg)
Animals divided into 2 groups
• Vertebrates• These are animals with
backbones.• Over 50,000 species of
vertebrates in world• Some examples are:
– humans– hummingbirds– Blue whales
• Invertebrates• These are animals
without ___________.• Over _________ species
of invertebrates in world.• Some examples are:
– _______________– ________________– ________________
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Vertebrates have 3 special features:
backbone
Internal skeleton skull
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Vertebrate are divided into 7 classes:
• Fish with bones (bass, trout, salmon)• Fish with cartilage (sharks, skates, rays)• Fish without jaws or scales (lampreys, hagfish)• Amphibians• Reptiles• Birds• mammals
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There are about 24,000 species of fish in the world.
• All fish live in water and breathe with their gills.
• Most fish have skeleton of bones.
• Ex: bass, trout, salmon• Bony fish covered in scales• Bony fish have swim bladder
that help them move up and down in water.
• Cold-blooded
• Some fish have cartilage instead of bone.
• They have powerful jaws and sharp teeth.
• Ex: sharks, skates, rays
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amphibians=“_______________”• Over 5,000 species of
frogs, toads, + salamanders.
• Live part of life on land, and part in water.
• Adult amphibians breathe with lungs or through their skin which is thin and moist.
• Cold-blooded
• Tadpoles to frogs
Tadpole live in water, Then grows legs, loses gills and tail, develops into frog.Frog lives on land.
This is called Metamorphosis.
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Reptiles
• Ex: snakes, lizards, turtles, alligators, crocodiles.• About 7,000 species.• Some live in water, some on land.• Skin is scaly and watertight.• Most lay eggs on land, and the egg is soft.• Reptiles breathe with lungs.• Cold-blooded which means their body temp.
changes with their surroundings.
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Birds• More than 9,000 species.• Almost all can fly-except – Ostrich ----emu ---penguins
• Feathers keep birds warm, provide lift for flying, and smooth their body.
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Birds cont.
• Have hollow bones that make it easy to fly.
• Need to eat constantly because they burn up so much energy flying.
• Breathe with lungs.• Lay eggs have hard shell
• Birds are – warm-blooded. – This means that no matter
what the temperature is inside or outside, their body temperature stays the same.
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Mammals
• Named for the mammary gland which produces milk for their babies.
• Mammals nurse their babies.
• Most mammals have hair that covers body
• Most live on land, but some in water, ex:– Whales, porpoises,
dolphins
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Mammals cont.
• All have lungs and breathe air.
• Most mammals birth live babies.-bears-elephants-mice-humans
• Some have babies inside a pouch, like– Opossums– kangaroos
• Only a couple lay eggs, such as – Duck-billed platypus\– Spiny anteater
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1. What three features do all vertebrate have?1.2.3.
2. How does a trout’s skeleton differ from a shark’s skeleton?
3. What happens during metamorphosis in a frog?
4. Why are a frog’s eggs able to survive in dry places?
5. What 2 features do mammals have that other vertebrates do not have?