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Definition
| The largest artery. It receives blood from the left ventricle and branches to all parts of the body (root aort/o). |
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Definition
| The semilunar valve at the entrance to the aorta |
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Definition
| The point of a cone-shaped structure (adjective, apical). The apex of the heart is formed by the left ventricle. It is inferior and pointed toward the left |
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Definition
| A vessel that carries blood away from the heart. All except the pulmonary and umbilical arteries carry oxygenated blood |
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Definition
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Term
| atrioventricular (AV) node |
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Definition
| A small mass in the lower septum of the right atrium that passes impulses from the sinoatrial (SA) node toward the ventricles |
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Definition
| A band of fibers that transmits impulses from the atrioventricular (AV) node to the top of the interventricular septum. It divides into the right and left bundle branches, which descend along the two sides of the septum; the bundle of His |
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Definition
| An entrance chamber, one of the two upper receiving chambers of the heart |
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Definition
| The valve between the left atrium and the left ventricle; the mitral valve |
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Definition
| The force exerted by blood against the wall of a vessel |
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Definition
| Branches of the AV bundle that divide to the right and left sides of the interventricular septum |
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Definition
| A microscopic blood vessel through which materials are exchanged between the blood and the tissues |
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Definition
| The part of the circulatory system that consists of the heart and the blood vessels |
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Definition
| The relaxation phase of the heartbeat cycle |
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Definition
| The thin membrane that lines the chambers of the heart and covers the valves |
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Definition
| The thin outermost layer of the heart wall |
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Definition
| Any sound produced as the heart functions normally |
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Definition
| The muscular organ with four chambers that contracts rhythmically to propel blood through vessels to all parts of the body |
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Definition
| The large inferior vein that brings blood back to the right atrium of the heart from the lower part of the body |
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Definition
| The valve between the left atrium and the left ventricle; the bicuspid valve |
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Definition
| The thick middle layer of the heart wall composed of cardiac muscle |
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Definition
| The fibrous sac that surrounds the heart |
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Definition
| The vessel that carries blood from the right side of the heart to the lungs |
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Definition
| The system of vessels that carries blood from the right side of the heart to the lungs to be oxygenated and then back to the left side of the heart |
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Term
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Definition
| The vessels that carry blood from the lungs to the left side of the heart |
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Definition
| The semilunar valve at the entrance to the pulmonary artery |
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Definition
| The wave of increased pressure produced in the vessels each time the ventricles contract |
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Definition
| The terminal fibers of the conducting system of the heart. They carry impulses through the walls of the ventricles. |
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Definition
| A wall dividing two cavities, such as the chambers of the heart |
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Definition
| A small mass in the upper part of the right atrium that initiates the impulse for each heartbeat; the pacemaker |
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Definition
| An instrument for determining arterial blood pressure (root sphygm/o means “pulse”); blood pressure apparatus or cuff |
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Definition
| The large superior vein that brings deoxygenated blood back to the right atrium from the upper part of the body |
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Term
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Definition
| The system of vessels that carries oxygenated blood from the left side of the heart to all tissues except the lungs and returns deoxygenated blood to the right side of the heart |
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Term
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Definition
| The contraction phase of the heartbeat cycle |
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Definition
| The valve between the right atrium and the right ventricle |
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Definition
| A structure that keeps fluid flowing in a forward direction |
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Definition
| A vessel that carries blood back to the heart. All except the pulmonary and umbilical veins carry blood low in oxygen |
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Definition
| A small cavity. One of the two lower pumping chambers of the heart |
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Definition
| A tube or duct to transport fluid |
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Definition
| The system that drains fluid and proteins from the tissues and returns them to the bloodstream. This system also aids in absorption of fats from the digestive tract and participates in immunity |
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