| A | B |
|---|
| arteriole | a small branch of a artery |
| atrium | receives blood from veins |
| capillary | connects arteriole and venule |
| electrocardiogram | recording of the activity of the heart |
| endocardium | inner lining of heart |
| epicardium | visceral portion of the percardium |
| myocardium | muscle tissue of the heart |
| systolic pressure | top number of blood pressure |
| venule | carries blood from cappillaries to vein |
