| A | B |
|---|
| Apex | Pointed part of the heart |
| Base | Flattened top portion of the heart |
| Arteries | Vessels that carry blood away from the heart |
| Veins | Blood vessels that carry blood to the heart |
| Aorta | Major artery leading from the heart to supply the body |
| Pulmonary arteries | Blood vessels that carry blood to the lungs to be oxygenated |
| Coronary arteries | Blood vessels that deliver blood directly to the heart muscle |
| Superior vena cava | Delivers blood from the upper body to the heart |
| Inferior vena cava | Brings blood from the lower body to the heart |
| Pulmonary veins | Bring blood from the lungs to the heart |
| Parietal pericardium | Fibrous sac surrounding and protecting the heart |
| Serous fluid | Substance produced by the parietal pericardium that allows the heart to beat without friction |
| Epicardium | Outer heart wall layer |
| Myocardium | Middle heart wall layer |
| Endocardium | Inner heart wall layer |
| Atria | Superior heart chambers |
| Ventricles | Lower heart chambers |
| Bicuspid | Valve between left atrium and left ventricle |
| Tricuspid | Valve between right atrium and right ventricle |
| Aortic valve | Valve between left ventricle and aorta |
| Pulmonary valve | Valve between right ventricle and pulmonary artery |
| Systemic circulation | Circulatory pattern that delivers oxygen to the body |
| Pulmonary circulation | Circulatory pattern that oxygenates blood at the lungs |
| Systole | Heart contraction |
| Diastole | Heart relaxation |
