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Circulation Mrs. P

7th grade life science

QuestionAnswer
atrium upper 2 chambers of heart
pacemaker sends signal that makes the heart muscle contract
ventricle lower 2 chambers of the heart
valve flap of tissue that prevents blood from flowing backward
artery vessles that carry blood away from the heart
capillary narrow vessles where substances are exchanged between the blood and cells
vein carry blood back to the heart
aorta the largest artery in the body
coronary artery carry blood into the heart, where coronary artery disease occurs
pulse caused by the alternating expansion and relaxation of the artery wall.
blood pressure blood exerting a force against the walls of the blood vessles
plasma liquid part of the blood
red blood cell cells that take up oxygen and deliver to the rest of the body
hemoglobin iron containing protein that binds chemically to oxygen molecules
white blood cell the body's disease fighters
platelet cells fragments that play an important part in forming blood clots
shock the failure of the circulatory system to provide an adequate supply of oxygen rich blood to the body
lymphatic system network of veinlike vessles that returns the fluid to the bloodstream
lymph consists of water and dissolved materials
lymph node filter lymph, trap bacteria, and other disease causing microorganisma
cardiovascular system carries needed substances to cells and waste products away from cells
heart hollow muscular organ that pumps blood throughout the body
Created by: erikapavlovich
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