Biology- circulation and digestion

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Substances transported in blood:
vitamins, oxygen, CO2, antibodies, water, glucose, lactic acid, toxins.
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Humans have a double circulatory system:
This has high pressure and fast blood flow.
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Pathway of blood through heart:
vena cava > right atrium> right ventricle> pulmonary artery> lungs> pulmonary vein> left atrium> left ventricle> aorta> rest of body> vena cava> repeate
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Natural pacemaker
Group of cells in right atrium, regulates heart beat.
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Artery
Blood AWAY from heart; high pressure/ oxygen.
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Vein
Blood TOWARDS heart; low pressure, valves.
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Capilary
Link artery's and veins, blood to body cells, allows for diffusion of substances.
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Part of blood: Platelets
Helps blood clot- scabs. Fibrnogen to fibrin.
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Part of blood: Red blood cells
Carries oxygen, biconcave, hemoglobin.
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Part of blood: white blood cells
Bodies defense system, antibodies and antitoxins.
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Part of blood: plasma
Carries waste products (CO2, urea), soluble products from digestive system carried.
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Coronary heart diasese
Cholesterol narrows artery- less blood gets through. When completety blocked: heart attack.
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Stents
For coronary heart disease, metal mesh opens up artery's.
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Artificial valves
Medication to stop clotting, titanium and polymers, or from pig/ human donors.
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Artificial heart
Give diseased heart rest to repair; for patients waiting for heart transplant, risk of blood clotting.
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Blood groups:
O, A, B, AB.
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Other cards in this set

Card 2

Front

This has high pressure and fast blood flow.

Back

Humans have a double circulatory system:

Card 3

Front

vena cava > right atrium> right ventricle> pulmonary artery> lungs> pulmonary vein> left atrium> left ventricle> aorta> rest of body> vena cava> repeate

Back

Preview of the back of card 3

Card 4

Front

Group of cells in right atrium, regulates heart beat.

Back

Preview of the back of card 4

Card 5

Front

Blood AWAY from heart; high pressure/ oxygen.

Back

Preview of the back of card 5
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