key words for circulatory systems
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each of the black spaces below before clicking
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Transport system | living things need this to carry substances around body
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circulatory system | the human transport system also known as . contains blood, blood vessels and heart.
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heart | muscular pump. sends blood all around body
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structure of the heart | 4 chambers. 2 atrium and 2 ventricles. divided down middle. 4 valves so blood flows backwards.
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blood vessels | 3 types. Arteries. Veins and capillaries.
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arteries | carries blood away from heart
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veins | carries blood towards heart
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capillaries | connects veins and arteries
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valves | prevent backflow
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blood | 3 main functions. transport , defence against infection and clotting
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plasma | 95 percent water and 3 types of cells suspended.
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red blood cells | most common. give blood its colour. contain chemical haemoglobin. this chemical carries oxygen through the body . it doesn't have nucleus.
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white blood cells | fewer . no definite shape. fights diseases in body and has a nucleus.
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3 platelets | tiny parts of cells. Are used to clot cuts. NO definite shape. has a nucleus
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Human body temp. | 37 degrees celcius
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pulse rate |
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