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Your circulation
At the centre of your blood system is your heart and the rest is made up of
tubes called blood vessels.
3 types of blood vessels: arteries, veins and capillaries.
ARTERIES carry blood away from the heart
VEINS carry blood back to the heart
When they get to an organ, arteries branch many times capillaries
Capillaries join up to form veins.
Oxygen, food and carbon dioxide pass in and out of the vlood in the
capillaries.…read more

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Wider than arteries
Thinner walls
Lower pressure blood flows slower
Blood controlled by valves to prevent blood flowing backwards.
Double Circulation
RIGHT side of the heart
Pumps blood to the lungs and then back to the heart again.
In the lungs, the blood picks up oxygen.
Carries oxygenated blood.
CO2 passes into the blood from body cells
LEFT side of the heart
Pumps blood to the rest of the body, then back to the heart.…read more

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The Heart
2 pumps side by side: RIGHT SIDE deoxygenated blood
LEFT SIDE oxygenated blood
Important blood vessels in the circulation:
o The aorta ­ takes blood from the heart to the body
o The pulmonary artery ­ takes blood from the heart to the lungs
o The vena cava ­ brings blood back to the heart from the body
o The pulmonary vein ­ brings blood back to the heart from the
lungs
Ventricles have muscular walls to pump the blood
The valves prevent…read more

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The right ventricle pumps blood to the lungs in the pulmonary artery
The left ventricle pumps blood to the rest of the body in the aorta
Deoxygenated blood returns to the right atrium in the vena cava
Oxygenated blood returns to the left atrium in the pulmonary vein
Control of the heart beat
Controlled by the pacemaker.…read more

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Plasma ­ mainly water with chemicals dissolved in it:
a. Food (sugars, amino acids, vitamins and minerals)
b. Chemical waste like urea
c. Blood proteins like antibodies
d. Hormones
2) 3 types of blood cells:
a. Red blood cells
b. White blood cells
c.…read more

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Blood Clotting
Platelets are small fragments of cells made of bone marrow
Platelets change fibrinogen into fibrin
Fibrin forms a meshwork of threads that traps red cells to make a clot.…read more

Comments

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Swallowtail

A very concise set of notes with useful coloured diagrams covering blood and circulation.These notes would be useful for all those GCSE specifications that have topics covering the circulatory system.  Why not use these alongside one of the quizzes or a set of flashcards?

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