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17470938
Circulation
Descrição
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year 8
Mapa Mental por
Fatima Syeda
, atualizado more than 1 year ago
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Criado por
Fatima Syeda
mais de 5 anos atrás
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Resumo de Recurso
Circulation
The circulatory System
Carries nutrients and oxygen to cells
Removes Carbon dioxide from the cells
transports other waste products to where they can be disposed of
distributes heat around body
heart
Engine room of circulatory system, pumps continuously to keep the blood moving through vessels
blood vessels
Motorways, main roads and side streets along which blood flows
blood
Blood vessels
Arteries
carry blood away from the heart
when the heart beats, it pumps blood through arteries under pressure
the walls of the arteries must be tough and elastic to withstand this pressure
If an artery is cut, then high pressure within it causes blood to spurt out very quickly
Arteries are protected deep in your body
capillaries
extend through the body, arteries branch into smaller and smaller blood vessels. The finest of these are capillaries
Capillaries walls are only one cell thick, this allows dissolved material to pass through them
veins
Veins carry blood back to the heart
Blood is pushed back to the heart by the contractiion of muscles pushiing against the veins
To make sure blood moves in one direction, there are valves along the veins
Valves open when blood is flowing to the heart and close when blood is flowing away from it
Bruises
Bruises form when capillaries near the skin burst and the blood leaks into the surrounding tissue
Heart
It is the size of your fist and situated in the middle of your chest
The circulatory system is known as a double system because there are two separate circuits
In the first circuit: Flood flows from the heart to the body and back to the heart, this circuit carries oxygen and nutrients to the heart
In the second circuit, blood flows from the heart to the lungs and back again
Blood
The only organ in the body that exists as a liquid
In blood, there are red blood cells, white blood cells, plasma and platelets
Anexos de mídia
Red Cells (binary/octet-stream)
Vessels (binary/octet-stream)
Queen (binary/octet-stream)
Bruise (binary/octet-stream)
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