| A | B |
|---|
| circulatory system | transport system made up of a network of tubes called blood vessels; includes heart, blood vessels, and blood |
| circulation | movement of blood through the body |
| heart | muscular body part that pushes blood through the blood vessels |
| blood vessels | tubes that carry blood to and from the heart |
| atrium | upper chamber of the heart; receives blood |
| ventricle | lower chamber of the heart; pumps blood out |
| pulse | throbbing caused by blood rushing into the arteries each time the ventricles contract |
| blood | tissue made up of several types of cells and a liquid called plasma |
| red blood cells | these cells carry oxygen from the lungs to other body cells |
| vein | a blood vessel that carries blood to the heart |
| capillary | tiny, thin-walled blood vessel that connects an artery and a vein |
| artery | a thick - walled vessel that carries blood away from the heart |
| white blood cells | these cells fight disease-causing germs |
| platelet | part of cell that helps the blood to clot or thicken |
| plasma | liquid part of the blood |
| G | unit of force equal to the force put on the body by Earth's gravity |
| gravity | force of attraction between two bodies because of air mass |
| blood transfusion | when blood from one person is given to another person |
