| A | B |
|---|
| atria / atrium | The upper, right and left chambers of the heart where blood first enters the heart from the body or the lungs. |
| pulmonary vein | Veins returning blood from the lungs which has just become oxygenated. |
| Pulmonary artery | Artery leaving the right side of the heart pumping deoxygenated blood to the lungs. |
| ascending aorta | large artery of the body delivering oxygenated blood to the upper body portion via the carotid(head), subclavian(left) and brachiocephalic (right) arteries. |
| decending artery | Largest artery carrying blood down toward the legs. |
| sedentary | Inactive lifestyle which can lead to heart problems |
| plaque | Fatty deposits which build up in the blood vessels |
| inferior vena cava | vein which collects deoxygenated blood from the lower portion of the body. |
| superior vena cava | Vein collecting deoxygentated blood from upper portion of the body. |
| myocardium | Thickest layer of heart muscle |
| pericardium | Thin, membrane sac surrounding the heart. |
| endocardium | Thin tissue which is the inner lining of the heart |
| septum | The wall dividing the right side of the heart from the left side of the heart. |
| atrioventricular valves | Valve between the atrium and ventricle of the heart |
| semilunar valves | Valves of three flaps one which leads to the pulmonary artery and one to the aorta |
| pacemaker | Self stimulating cells inside the heart which cause the heart to beat. |
| diastole | relaxed filling of the heart |
| atrial systole | contraction of the atria |
| ventriular systole | contraction of the ventricles |
| blood pressure | pressure of the blood against the walls of the arteries |
| systolic blood pressure | Pressure during contraction |
| diastolic | pressure during relaxation of heart |
