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प्रश्न
While learning to ride a bicycle Boojho lost his balance and fell. He got bruises on his knees and it started bleeding. However, the bleeding stopped after some time.
- Why did the bleeding stop?
- What would be the colour of the wounded area and why?
- Which type of blood cells are responsible for clotting of blood?
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उत्तर
- Bleeding stops due to coagulation/clotting of blood.
- The colour of wounded area would initially be dark red due to the clotting of blood.
- Platelets are responsible for the clotting of blood.
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