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Circulatory System
| Term | Definition |
|---|---|
| circulatory system | Also known as the cardiovascular system |
| heart | muscular hollow organ called the "pump" of the body |
| endocardium | inner layer of the heart |
| myocardium | middle layer of the heart |
| pericardium | outer layer of the heart |
| septum | separates the heart into left and right sides |
| atria | upper chambers of the heart |
| ventricles | lower chambers of the heart |
| tricuspid valve | one-way valve located between the right atrium and right ventricle. |
| pulmonary valve | one-way valve located between the right ventricle and pulmonary artery. |
| pulmonary valve | Takes deoxygenated blood to the lungs. |
| bicuspid or mitral valve | one-way valve located between the left atrium and left ventricle |
| aortic valve | one-way valve located between the left ventricle and aorta. |
| aorta | largest artery in the body |
| aortic valve | takes oxygenated blood to the body cells. |
| pulmonary veins | bring oxygenated blood from the lungs. |
| arteries | carry blood away from the heart |
| veins | carry blood to the heart. |
| capillaries | connect arteries and veins. |
| diastole | brief period of rest in the cardiac cycle |
| systole | period of ventricular contraction in the cardiac cycle |
| closed fist | the size of the heart |
| oxygen and nutrients | transported to the body cells |
| carbon dioxide and metabolic materials | transported away from the body cells. |