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Circulatory system
Vocabulary and definitions
21
Physiology
6th Grade
10/06/2010

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Term
Heart
Definition
the major organ of the circulatory system that pumps blood to all parts of the body
Term
Arteries
Definition
blood vessels that carry blood away from the heart
Term
Veins
Definition
blood vessels that carry blood back to the heart
Term
Capillaries
Definition
Smallest blood vessels where the exchange of oxygen and carbon dioxide takes placed
Term
Blood vessels
Definition
Arteries, veins, capillaries
Term
How many chambers does the heart have?
Definition
Four
Term
Atria
Definition
upper chambers of the heart
Term
ventricles
Definition
lower chambers of the heart
Term
Parts of the blood
Definition
plasma, red blood cells, white blood cells, platelets
Term
Platelets
Definition
small cells that cause blood clots to form
Term
Plasma
Definition
liquid part of the blood
Term
red blood cells
Definition
carry oxygen to all cells in the body
Term
white blood cells
Definition
fight off foreign matter such as bacteria and viruses
Term
Hemoglobin
Definition
chemical that combines with oxygen to make blood red
Term
four blood types
Definition
O, A, B, AB
Term
Aorta
Definition
largest artery in the body
Term
Vena cavae
Definition
largest vein in the body
Term
Septum
Definition
wall that separates the right half of the heart from the left
Term
Pericardium
Definition
Sac that surrounds the heart
Term
Materials brought to each cell
Definition
Oxygen, food, water
Term
Materials removed from each cell
Definition
waste products, carbon dioxide
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