| A | B |
|---|
| heart | a muscle in your chest that pumps blood throughout your body |
| vein | type of blood vessel that carries blood to your heart |
| artery | type of blood vessel that carries blood away from your heart |
| platelet | special cell found in the blood that help your blood to clot and stop bleeding |
| lungs | the two spongy, bag-like organs found in the chest that are used to take in air, absorb oxygen and give off carbon dioxide |
| blood | the fluid found in the body that carries oxygen to all parts of the body and carries away waste materials |
| breathe | to take air into the lungs and to force it out |
| oxygen | a colorless, odorless, tasteless gas that is needed for humans and animals to live |
| carbon dioxide | a colorless and odorless gas that is made when humans and animals breathe |
| blood vessel | a narrow tube that blood flows through; veins and arteries are blood vessels |
| circulatory system | the group of organs, such as the heart, arteries and veins, that move blood through the body |
