Classifying animals
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Classifying Animals. Vertebrates Chap. 3, lesson 2, pages 51-65. 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

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Classifying Animals

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Classifying animals

Classifying Animals

Vertebrates

Chap. 3, lesson 2, pages 51-65


Animals divided into 2 groups

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:

    • _______________

    • ________________

    • ________________


Vertebrates have 3 special features

Vertebrates have 3 special features:

Internal skeleton

skull

backbone


Vertebrate are divided into 7 classes

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


There are about 24 000 species of fish in the world

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


Amphibians

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.


Reptiles

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.


Birds

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.


Birds cont

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.


Mammals

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


Mammals cont

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


Classifying animals

  • What three features do all vertebrate have?

    • 1.

    • 2.

    • 3.

  • How does a trout’s skeleton differ from a shark’s skeleton?

  • What happens during metamorphosis in a frog?

  • Why are a frog’s eggs able to survive in dry places?

  • What 2 features do mammals have that other vertebrates do not have?


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