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Circulatory System
Term | Definition |
---|---|
atrium | two upper chambers of the heart that contract at the same time during a heartbeat |
ventricle | two lower chambers of the heart that contract at the same time during a heartbeat |
coronary circulation | flow of blood to and from the tissues of the heart |
pulmonary circulation | flow of blood through the heart to the lungs and back to the heart |
systemic circulation | largest part of the circulatory system in which oxygen-rich blood flows to all the organs and body tissues except the heart and the lungs and oxygen-poor blood returns back to the heart |
artery | blood vessel that carries blood away from the heart and has a thick,elastic walls made of connective tissue and smooth muscle tissue |
vein | blood vessel that carries blood to the heart and has one-way valves that keeps blood moving to the heart |
capillary | microscopic blood vessel that connects arteries and veins; has walls one cell thick, through which nutrients and oxygen diffuse into body cells, and waste materials and carbon dioxide diffuse out of body cells |