This document classifies and describes different groups of animals. It divides animals into two main groups: invertebrates without backbones, which make up over 96% of species and include arthropods, mollusks, worms, sponges, and cnidarians; and vertebrates with backbones, which include fish, amphibians, reptiles, birds, and mammals. It provides distinguishing characteristics of each group, such as their body structure, temperature regulation, habitat, and locomotion.

1. Classifying Animals
Chapter 7, Lesson 3
http://gardenofeaden.blogspot.com/2011/10/cheetah.html

2. Standard:
S5L1a. Demonstrate how animals are sorted in
to groups (vertebrate and invertebrate) and
how vertebrates are sorted into groups
(fish, amphibian, reptile, bird, and mammal).
Main idea: The differences between animals
determine how they are classified.

3. Characteristics of
Animals
•Many –celled
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•Require oxygen http://4.bp.blogspot.com/-NO-
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•Eat food
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•Most move
from place to
place
•Reproduce
sexually

5. Animal Species
Over 96% of
1% 1% all animals
1%
4%
4% today are
5%
Arthopods
invertebrates!
Mollusks
Worms
Vertebrates
Sponges
Cnidarians
84% Echinoderms

6. Invertebrates
Animals without a backbone are invertebrates.
Over 96% of the animal species are invertebrates.
Review:
Symmetry- a matching pattern of body shape.
Radial symmetry – body parts arranged equally
around a middle point
Bilateral symmetry – bodies with two similar
halves

7. Bilateral
Symmetry
Radial Symmetry

9. Cnidarians – The Stinging Animals
• Jellyfish and coral
• Simple digestive
systems with
mouths
•Radial symmetry

10. Echinoderms
• Starfish, sea
urchins, and sea
cucumbers
•Means “spiny skin”
• Sucker-like parts to
catch prey

11. Arthropods
• lobsters, crabs, spiders, and insects
• largest group of animals
• jointed parts surrounded by an
exoskeleton (hard covering)
•Bilateral symmetry

12. Sponges
• Lack
tissues, organs
and true body
symmetry
•Most live in
oceans, a few live
in freshwater
•Filter bits of food
from water that
passes through
them

13. Mollusks
•Clams, oysters, snails, squi
ds, octopuses
•Soft bodies – most have
shells
•Live, eat & move many
different ways

14. Worms
• Includes
flatworms, roundworms &
segmented
Worms.
•Bilateral symmetry
•Heads and simple organ
systems
•Some are parasites – they live
and feed off the body of a host

15. Let’s Review
Invertebrates- Be
ready to take the
quiz!

16. Let’s review!!
Vertebrates – animals with a backbone
Cold-blooded – the temperature of the animal
depends on the temperature outside their
bodies
Warm-blooded – the animal’s body maintains
its own heat
Let’s learn about Vertebrates!!

17. Cold-blooded Vertebrates-
Ectotherms
• Reptiles
• Amphibians
• Fish
The body temperature of a cold-
blooded (ectotherms) animal depends
on the temperature outside their
bodies.

18. Fish
• Most have a bony
skeleton (sharks have
cartilage skeleton)
•Gills to breathe in
water
•Most cold-blooded
•Scales
•Swim bladder

19. Amphibians
•
frogs, toads, salamanders, ne
wts included
• need to live close to water
• some have lungs
• some breathe through skin
• need water to reproduce
• salamanders & newts
•have tails
•most live near water –
some in deserts though

21. Warm-blooded Vertebrates -
Endotherms
•Birds
•Mammals
Maintain constant internal body
temperatures – body cells produce heat

22. Birds
• live almost anywhere in
world
• feathers
• beaks instead of teeth
• some eat mammals, fish
and other birds
• some eat insects
• some eat plants/seeds

23. Mammals
 Humans are mammals
 Most complex organs & nervous system
 large brain
 complex behaviors
 hair – even whales have whiskers
 feed milk to young
 most have teeth
 can move place to place

24. Let’s review
vertebrates – be ready
to take the quiz!