- Mention any two components of blood.
- Trace the movement of oxygenated blood in the body.
- Write the function of valves present in between atria and ventricles.
- Write one structural difference between the composition of artery and veins.
CBSE DELHI - OUTSIDE DELHI - FOREIGN SET 2 2018
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- Components of blood: Plasma and blood cells (corpuscles)
- Movement of oxygenated blood in the body:
- Valves present in between atria and ventricles help to restrict the backflow of the blood from the ventricle to the atrium when the ventricle contracts.
- Differences between artery and vein:
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Artery
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Vein
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1.
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It has thick elastic muscular walls.
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It has thin, non-elastic walls.
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2.
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It does not contain valves.
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It contains valves to prevent the backflow of blood.
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3.
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Blood flows under high pressure.
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Blood flows under low pressure.
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