| A | B |
|---|
| circulatory system | consists of the heart, blood, and blood vessels |
| jobs are | bring needed materials, remove waste products, and fight diseases |
| heart | pumps blood through the body |
| atrium | receive blood that come into heart-upper chambers |
| ventricles | pump blood out of heart-lower chmabers |
| valve | flap of tissue that prevents blood from flowing backwards |
| heart muscle contracts | heart pumps blood out |
| heart muscle relaxes | heart fills with blood |
| arteries | blood vessels that carry blood away from heart |
| capillaries | small in size/substances are exchanged between blood and body cells |
| veins | vessels that carry blood back to heart |
| figure eight | pattern of blood flow through the body |
| loop one | blood travels from heart to lungs and then back to heart |
| loop two | blood is pumped from the heart thoughout the body and then returns to the heart |
| aorta | largest artery in the body |
| plasma | liquid part of blood |
| red blood cells | take up oxygen in lungs and deliver to rest of body |
| hemoglobin | red blood cells are mostly made of this-conatins iron that the oxygen attaches itself to |
| white blood cells | fight diseases-fewer of them found in the body |
| platelets | important for blood clotting |
