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