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A & P Chapter 11
| Term | Definition |
|---|---|
| Aorta | Large arterial trunk, channels blood from the heart into other arteries |
| Aortic Valve | Semilunar valve between the left ventricle and the aorta that stops blood from flowing back into the left ventricle |
| Atrioventricular Valves | Tricuspid and Mitral valves |
| Cardiac Output | Blood pumped per minute |
| Diastole | Period of relaxation whenn heart chambers are filling with blood |
| Endocardium | Innermost heart layer, lines chambers |
| Epicardium | Outermost layer of the heart, innermost layer of the pericardial sac |
| Inferior Vena Cava | Largest vein in the body, returns deoxygenated blood to the right atrium of the heart from lower body regions |
| Interatrial Septum | Wall separating right and left atria |
| Interventricular Septum | Thick wall separating the two ventricles |
| Mitral Valve | closes the orifice between left atrium and right ventricle...bicuspid valve |
| Myocardium | Middle heart layer |
| Papillary Muscle | Muscular bundle attached at one end to the chordae tenduneae and at the other to the innermost or endocardial wall of the ventricles, maintains tension on the chordae tendineae as the ventricle contracts |
| Semilunar Valves | Valves at the opening between the heart and aorta and at the opening between the heart and pulmonary artery, prevents backflow of blood into ventricles |
| Stroke Volume | Volume of blood pumped per beat |
| Superior Vena Cava | Returns deoxygenated blood to the right atrium from upper region of the body |
| Systole | Period of contraction when the chambers are pumping blood out of the heart |
| Tricuspid Valve | Closes the orifice between the right atrium and ventricle, composed of three cusps |
| Vasoconstriction | narrowing of the blood vessels, decreasing blood flow |
| Vasodilation | Widening of the blood vessels, increasing blood flow |
| Arrythmia | An irregular heartbeat or rhythm |
| AV Node | Small mass of tissue that transmits impulses received from the sinoatrial node to the ventricles via the bundle of his |
| Bradycardia | Slow heart beat |
| SA Node | Small mass of tissue located in the right atrium that normally acts as the pacemaker of the heart, causing it to beat normally |
| Tachycardia | Fast heartbeat |
| Aortic Arch | Curved portion of the aorta |
| Arteries | Vessels carrying blood away from the heart |
| Brachial Artery | Fold of the elbow |
| Capillaries | Vessels where oxygen and CO2 exchange occurs |
| Carotid Artery | Side of the neck |
| Pulmonary Circulation | Oxygen-poor blood from the right ventricle, through the lungs, and returning to the left atrium with oxygen-rich blood |
| Veins | Vessels carrying blood to the heart |
| Vital Signs | Measurements of pulse and blood pressure |
| Angina Pectoris | Insufficient blood supply to the heart.....chest pains |
| Atherosclerosis | Hardening of the arteries |
| Coronary Artery Disease | Narrowing of CA due to plaque buildup |
| Hypertension | High blood pressure |
| Ischemia | Lack of blood flow, usually because of narrowing blood vessels |
| Myocardial Infarction | Tissue death that occurs in a segment of heart muscle from blockage |
| Palpitations | Rapid heartbeat |
| Peripheral Vascular Disease | Narrowing of the arteries in the legs |
| Stroke | Blockage of blood flow to the brain, brain cells die from lack of oxygen |
| Transient Ischemic Attack | Temporary lack of blood flow to the brain |
Created by:
Andrearoberts
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