Science Chapter 2

Front

Why are some muscles attached to bones?

Back

They move the bone to help move the body.

Front

After they are born, most mammals:

Back

are helpless for a long time.

Front

Tiny, thin-walled blood vessels where the blood and body cells exchange substances are called:

Back

capillaries.

Front

Which of these provides support and protection for many insects?

Back

exoskeleton.

Front

What three nervous systems work together to make an animal move about?

Back

nervous system, skeletal system, muscular system.

Front

What is the function of muscles in the body?

Back

Muscles help in movement by contracting and relaxing.

Front

What is an exoskeleton?

Back

A hard outer structure that provides support and protection for some animals.

Front

What are capillaries?

Back

Capillaries are tiny blood vessels where gas and nutrient exchange occurs.

Front

What is the role of the nervous system?

Back

The nervous system controls and coordinates body activities.

Front

What do mammals need after they are born?

Back

Most mammals need care and protection after they are born.