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Circulatory System
Circulatory System Terms
17
Science
7th Grade
05/05/2010

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Term
Artery
Definition
Blood vessels that carry oxygen rich blood away from the heart
Term
Vein
Definition
Blood vessels that carry oxygen poor blood back to the heart
Term
Capillary
Definition
Tiny blood vessels that exchange oxygen for carbon dioxide at the cell level
Term
Atrium
Definition
Upper two chambers of the heart muscle
Term
Ventricle
Definition
Lower two chambers of the heart that pump blood out of the heart
Term
Aorta
Definition
The largest blood vessel, carries blood away from the heart to the body
Term
Plasma
Definition
Liquid part of blood; yellow
Term
Red Blood Cell
Definition
Carries oxygen to the cells of the body using hemoglobin
Term
White Blood Cells
Definition
Fight disease in the body
Term
Platelets
Definition
Cells that help to clot blood in the case of injury
Term
Cardiovascular System
Definition
The system that contains the heart, blood and blood vessels.
Term
Hemoglobin
Definition
A protein that holds oxygen on red blood cells
Term
Pacemaker
Definition
Cells in the heart muscle that tell the heart to contract or beat.
Term
Fibrin
Definition
A protein that makes strands to help clot blood that repairs skin injuries
Term
Cardiac Muscle
Definition
Tissue that makes up the heart, striated.
Term
Valve
Definition
Flap of tissue in the heart and blood vessels that allow blood to flow only one direction
Term
Diffusion
Definition
The movement of oxygen from oxygen rich blood cells to cells that are oxygen poor.
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