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LCE SCIENCE

Ch 3: Circulation Sec 1: The Body's Transport System

TermDefinition
cardiovascular system the body system that consists of the heart, blood vessels and blood; also called the circulatory system
heart a hollow, muscular organ that pumps blood throughout the body
atrium each of the two upper chambers of the heart that receives blood that comes into the heart
ventricle each of the two lower chambers of the heart that pumps blood out of the heart
valve a flap of tissue in the heart or a vein that prevents blood from flowing backward
pacemaker a group of cells located in the right atrium that sends out signals that make the heart muscle contract and that regulates the heart rate
artery a blood vessel that carries blood away from the heart
capillary a tiny blood vessel where substances are exchanged between the blood and the body cells
vein a blood vessel that carries blood back to the heart
aorta the largest artery in the body; receives blood from the left ventricle
Created by: LCEclass
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