Features of Animals

A14-17LS-E-B2; LS-E-A3; LS-E-A4

Study Guide

• 1. What is a simple animal? (A14)• A simple animal has many cells but few

body parts.• Give examples: sponges, worms

2. What is a complex animal? (A 14)

• A complex animal has many body parts.

• Example: a snail

3. What is a sponge? A14

• A sponge is one of the simplest animals.• A sponge has a bag shaped body. Two

cell layers make up the body of the sponge.

Purple Tube Sponge

A sponge garden under the water

A Natural Sea Wool Sponge

Barrel Sponge

4. Why is a snail considered a more complex animal than a worm? A15

• Snails are considered more complex animal because They have bodies made of many parts (shell, head, sense organs, mouth).

• complex

Worm Dissection

• No backbone- few parts - simple

5. Animals can be divided into two groups according to structures that support their

bodies. Name the two groups.A16

• The two groups are vertebrates and invertebrates.

6. Define Vertebrates.A16• Vertebrates are animals with backbones.

Three examples of vertebrates.

• 1. Birds

2. Snakes (Vertebrate)

3.Humans (vertebrates)

4. Bats-vertebrates

7. Define invertebrates and give three examples. A 16

• Invertebrates are animals without backbones.

• An outer covering, such as a shell usually supports its body. This is called an exoskeleton.

Lobster Exoskeleton-no backbone

Spider Exoskeleton – no backbone

What does exoskeleton mean?

• It is an external skeleton found in an invertebrate.

• This definition is not found in the book.

The name of the largest group of invertebrates is: (A16)

• Arthropods

More Arthropods

More Arthropods

Define arthropods. Give 3 examples. A16

• Arthropods have legs with several joints and they do not have a backbone.

• Example: ants, spiders, crabs

Ants-legs with joints, no backbone

• arthropod

Spider- legs with joints, no backbone

• arthropod

Crab- legs with joints, no backbone

• arthropod

11. Name the only mammal that flies. A17

• Bat

12. What is the name of the group of animals that have a backbone, an internal skeleton,

fur, and they give birth to live young?

• Mammals (Not in book)