| A | B |
|---|
| Outermost layer of heart wall | Epicardium |
| Middle layer of heart wall (the cardiac muscle) | Myocardium |
| Innermost layer of heart wall | Endocardium |
| Heart chamber that receives deoxygenated blood from body tissues (except lungs) | Right atrium |
| Heart chamber that pumps deoxygenated blood to the lungs | Right ventricle |
| Heart chamber that receives oxygenated blood from the lungs | Left atrium |
| Heart chamber that pumps oxygenated to the body tissues | Left ventricle |
| Name the 3 blood vessels that empty into the right atrium | Superior vena cava, inferior vena cava, coronary sinus |
| Name the blood vessel that the right ventricle pumps blood into | Pulmonary trunk |
| Name the blood vessels that empty blood into the left atrium | Pulmonary veins |
| Name the blood vessel that the left ventricle pumps blood into | Aorta |
| Give 2 names for the valve between right atrium and right ventricle | Right AV or tricuspid |
| Give 3 names for the valve between left atrium and left ventricle | Left AV, bicuspid, or mitral |
| When the atria are contracting, the AV valves are ____ and the SL valves are ___. | Open / closed |
| When the ventricles are contracting, the AV valves are ___ and the SL valves are ___. | Closed / open |
| Contraction of a chamber is called ____; relaxation is called ____. | Systole / diastole |
