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Chapter 33 Terms
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1.Angina pectoris Pain that indicates a heart attack Caused by a blockage in the coronary artery
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Antibody Y shaped proteins Created by the immune system Clump foreign substances together in the blood
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Antigen A foreign substance in the body that triggers an immune response.
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Aorta The largest artery in the body Exits the heart
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Arteriole Smallest branching of an artery Lead directly to capillaries
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Artery Blood vessel that moves blood AWAY from the heart Very thick walls
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Atrioventricular valve Valves found between the ATRIA and VENTRICLES Prevents backflow of blood
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Atrium “TOP” chambers of the heart Move blood into ventricles “Measure” blood for the ventricles to pump
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blood Connective tissue Medium that carries requirements to cells Medium that carries wastes away from cells
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blood pressure Pressure exerting on the INSIDE of blood vessels Created by the force of the pumping heart
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capillary Smallest blood vessels in body Materials can enter and exit the blood through capillaries
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cardiac cycle One complete cycle of the heart beat
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circulatory (cardiovascular system) System of transport in organisms Moves materials to and from tissues
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closed circulatory system Circulatory system where blood does NOT leave the conducting vessels
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diastole Relaxation period of the heart cycle
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ECG ElectroCardioGram Graph of the electrical activity of the heart during the cardiac cycle
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Heart attack Situation where blood flow is blocked from the heart tissues Muscle cells cannot contract
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Hemoglobin Molecule that gives blood its red color Carries oxygen in the blood
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lymph Tissue fluid that is actively being transported back to the bloodstream via lymph vessels
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Open circulatory system Circulatory system where blood exits the vessels and bathes tissues directly (more primative)
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plasma Liquid part of the blood (55%) Mostly made up of water
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Portal system A pathway of blood that begins and ends in capillary flow i.e blood flows from the intestine to the liver and then back to the main bloodstream
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Pulmonary circuit Circuit of blood flow from the heart to the lungs and back to the heart
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Pulse “Bubble” of blood that passes through arteries after the heart beats
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Red blood cell Type of cell that contains the hemoglobin Carries oxygen
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Semilunar valve (aortic valve and pulmonary valve) Valves that prevent backflow of blood
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Septum
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Stroke
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Systemic circuit Circulation of blood from the heart to the body tissues and then back to the heart again.
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Systole Period of contraction during a heartbeat
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Tissue fluid Fluids surrounding cells Contain materials that must be diffused into the cells Contain waste materials (from cells) that must be removed
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Vein
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Vena cava
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Ventricle
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Venule Smallest branching of a vein. Blood enters these from the capillaries
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White blood cell
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