Heart And Circulation
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Name the parts of the circulatory system
Heart, blood, all blood vessels
The heart is a muscle that pumps and pushes blood by contracting over —- per minute
60 times out of
How big is the heart, where is it
Size of a closed fist, between lungs protected by rib cage
What are arteries
Blood vessels with tick elastic wall to allow large amount of pressure from blood.
What blood do arteries carry name the exception
Oxygenated blood, except the pulmonary artery
Name the largest artery in body
Aorta
Arteries divide into smaller blood vessels called: — until they reach the —
Arterioles, capillaries
What are veins
Blood vessels with less elastic walls bc blood pressure is weaker when blood return to heart.
What do veins carry, one exception
Deoxygenated blood , except pulmonary vein Always bring blood back to the heart
What do veins contain to prevent blood from flowing backwards.
Valves
Why do veins need valves other than prevent blood from flowing backwards
Bc blood doesn’t return to the heart in its own it’s with muscle contraction, apply pressure to veins
Veins divide into smaller blood vessels called: — until they reach —-
Venules, capillary network
What are capillaries
Thin blood vessels where blood flow is very slow
The slow blood flow in capillaries allow:
Gas exchange to occur diffusion; cells receive oxygen and get rid of carbon dioxide
What is the pulmonary circulation
Carri’s deoxygenated blood to the lungs in order to get rid of waste Reloads with oxygenated blood and brings it to heart
What is systemic circulation
Carri’s oxygenated blood to cells of body. Blood travels longer distance since it goes through entire body.
Go learn steps for pulmonary and systemic circulation
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