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A & P Chapter 11

TermDefinition
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