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Animal Skeleton Types

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Animal Skeleton Types

Various animal skeletons illustration

🦴 Part 1: Skeleton Types

Remember: There are three main types of skeletons:

Endoskeleton - bones inside the body (like humans)

Exoskeleton - hard shell outside the body (like crabs)

Hydrostatic skeleton - muscles and water pressure (like worms)

1. Which type of skeleton do humans have?

Endoskeleton

Exoskeleton

Hydrostatic skeleton

2. A crab's hard shell is an example of which skeleton type?

Endoskeleton

Exoskeleton

Hydrostatic skeleton

3. Which animals have hydrostatic skeletons? (Tick all that apply)

Earthworms

Octopus

Birds

Jellyfish

🔗 Part 2: Animal Matching

4. Draw lines to match each animal to its skeleton type:
Fish
Beetle
Slug
Dog
Lobster
Endoskeleton
Exoskeleton
Hydrostatic skeleton
Endoskeleton
Exoskeleton
5. Fill in the blanks:

Birds have an _____________ skeleton made of lightweight bones that help them _____________.

6. Why do you think insects need to shed their exoskeleton as they grow?

✏️ Part 3: Functions and Understanding

7. Name two important jobs that skeletons do for animals:

1. _________________________________

2. _________________________________

8. Which skeleton type would be best for an animal that needs to squeeze through tight spaces? Explain why.
9. True or False? Circle your answers:

All animals have skeletons: TRUE / FALSE

Sharks have bones like humans: TRUE / FALSE

Snails have exoskeletons: TRUE / FALSE

10. Draw and label one example of each skeleton type in the box below:

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