| A | B |
|---|
| circulatory system | body's transportation system |
| heart | muscle that acts as a pump for the circulatory system |
| blood vessels | tubes that carry blood throughout the body |
| materials carried in blood | oxygen, nutrients, germ fighters, hormones, and wastes |
| four chambers of the heart | left and right atrium, left and right ventricle |
| arteries | carry oxygen-rich blood away from the heart |
| veins | carry oxygen-poor blood toward the heart |
| capillaries | very tiny branches of arteries and veins |
| blood pressure | force of blood pushing against the walls of the blood vessels |
| Blood contains | liquid and solid parts |
| 4 main types of blood | A, B, AB, O |
| platelets | help to clot blood |
| white blood cells | help destroy disease germs in that enter the body |
| red blood cells | carry oxygen to all other cells and carry some wastes away |
| plasma | transports dissolved food and blood cells |
