| A | B |
|---|
| circulatory system | the heart and the network of blood vessels which work together to carry blood throughout the body |
| circulation | the movement of blood to the heart through the network of blood vessels throughout the body and back to the heart |
| blood | a tissue made up of a liquid called plasma of several types of cells |
| capillaries | a tiny thin walled blood vessel that connects an artery and a vein |
| ventricle | either of the two lower chambers of the heart |
| pulse | the number of times that the heart beats in one minute |
| kidneys | one pair of organs that clean and filter the blood |
| heart | the muscular organ that pumps blood through the blood vessels of the body |
| veins | a blood vessel that carries blood to the heart |
| excretory system | the body system that gets rid of harmful waste produced by the cells |
| arteries | a thick walled blood vessel that carries blood away from the heart |
| atrium | either two of the upper chambers of the heart |
