Front

What are the balloon-like structures in the bodies of some animals that take in air and release waste?

Back

Lungs

Front

What is the name of the pump made of muscles that circulates blood in the body?

Back

Heart

Front

What are the tubes that carry blood back INTO the heart called?

Back

Veins

Front

What are the tubes that carry blood AWAY from the heart called?

Back

Arteries

Front

What is the process of moving blood throughout the body?

Back

Circulation

Front

What is the main function of the heart?

Back

To pump blood throughout the body.

Front

What do arteries do?

Back

Carry oxygen-rich blood away from the heart.

Front

What do veins do?

Back

Carry oxygen-poor blood back to the heart.

Front

What is the role of the lungs in the circulatory system?

Back

To exchange oxygen and carbon dioxide.

Front

What is blood made of?

Back

Red blood cells, white blood cells, platelets, and plasma.