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11 Cards in this Set
- Front
- Back
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what is the role of the circulatory system?
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it moves blood (oxygen, nutrients) through the body to bring cells the subsances they need or to rid them of the waste they produce
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What are the main parts of the circulatory system?
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heart, blood and blood vessels
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what is the function of the heart?
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the ventricles push blood out, the left ventricle contracts to push blood out to the entire body and the light ventricles push blood out to the lungs
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What are the main parts of blood?
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platellets: coagulation less than 1%
red blood cells: carries oxygen and carbon dioxide 45% white blood cells: play a role in immunity, protection against antigens+elimination of dead cells less than 1% plasma: transports solid things 55% |
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What is the function of blood?
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plays a role in bringing the body what it needs and ridding it of waste
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What are the blood vessels?
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arteries, arteriole, cappillaries, venules and veins.
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What are arteries?
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they are blood vessels with thick, elastic walls that withstand a large amount of pressure
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What are aterioles?
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the arteries divide into smaller and smaller arteries then into arterioles
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What are cappillaries?
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Since the blood circulation is very slow in the cappillaries, this is where exchanges occur by diffusion between the blood and the cells. The cells receive nutritional substances and oxygen
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What are venules?
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they keep getting bigger and bigger until they turn into veins. They have muscles and valves that ensurrre that the blood returns to the heart
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what is the path blood follows to the heart?
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heart---->artery---->arteriole---->cappilaries---->venule---->vein----->heart
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