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Circulatory Systems

TermDefinition
Cardiovascular system The body system that consists of the heart, blood vessels, and blood; circulatory system.
Heart A hollow, muscular organ that pumps blood throughout the body.
Atrium Each of the two upper chambers of the heart that recives blood that comes into the heart.
Pacemaker A group of cells located in the right atrium that sends out signals that make the heart muscle contract and that regulates hearteat rate.
Ventricle A lower chamber pof the heart that pumps blood out to the lungs and body.
Valve A flap of tissue in the heart or a vein that prevents blood from flowing backward.
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 human body.
Coronary Artery An artery that supplies blood to the heart itself.
Pulse The alternating expansion and relaxation of an artery wall as blood travels through an artery.
Diffusion The process by which molecules move from an area of higher concentration to an area with a low amount of concentration.
Pressure The force excerted on a surface divided by the total area over which the force is exerted
Blood Pressure The pressure that is excerted by the blood against the walls of blood vessels.
Created by: FuntomFive