Support, Movement, and Protection

________ is a strong and flexible material found in a skeleton.

• cartilage 
• blood
• hairs 
• meat 

Which of the following is an example of a hinge joint?

• shoulders 
• neck 
• knee 
• eyes 

________ contracts and relaxes to produce movement.

• bones 
• tendons 
• muscles 
• toes 

Which internal structure is the strongest muscle in your body?

• lungs 
• heart 
• brain 
• stomach

Unlike bones, an exoskeleton....

• is on the outside of the body
• grows with the animal
• is made of fur
• is made of slime

Some caterpillars ____ to protect themselves from danger.

• produce chemicals 
• have spines 
• fly 
• have antlers 

Birds have _________ bones that help them fly. 

• water filled 
• hollow 
• sharp 
• dense 

Which of the following is a way a rabbit can protect itself from predators?

• running away 
• having a poisonous tongue 
• screaming 
• climbing a tree 

An example of a water filled animal that uses tiny hairs and contracts its muscles to move is...

• bird 
• snake 
• earthworm 
• snail