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the circulatory system - Coggle Diagram
the circulatory system
blood
blood vessels
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capillary
a very thin blood vessel through which the exchange of material between blood and cells takes place
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plasma
liquid part of blood; main function is transport of blood cells, food molecules, carbon dioxide, hormones and urea
platelets
help to covert fibrinogen to fibrin in blood clotting - the fibrin forms a mesh to trap the blood- and in the formation of scabs
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the heart
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the body has double
circulation- the blood
travels through the
heart twice for each
complete circuit of
the body
important terms
ventricles- the lower chambers in the heart, which pump blood to the lungs and around the body
atria- the upper chambers in the heart, which receive blood from body and the lungs
the ventricle are thicker than the atria as they are the chambers that pump the blood
the left ventricle has a thicker muscular wall than the right ventricle as it pumps blood round the body - not just lungs
the valves prevent back flow and make sure that the heart acts as a unidirectional (one-way) pump
the coronary blood vessels supply the heart muscle with blood
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