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What is the use of platelets?...

What is the use of platelets?

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1) Blood platelets play an important role in blood clotting.
2) When the blood vessel is injured, the platelets collect at the site of the injury and form a plug.
3) This reduces the loss of blood to some extent.
4) They also release several factors into the blood which help in blood clotting and in the repair and healing of blood vessels.
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VGS PUBLICATION-BRILLIANT-TRANSPORTATION - THE CIRCULATORY SYSTEM-4 MARK QUESTIONS
  1. What is the use of platelets?

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  2. Describe the internal stsructure of heart with a neat labelled diagram...

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  3. What is called pumping station in human body ? Expain its structure wi...

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  4. What is coagulation ?

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  5. Collect information from internet and other sources about blood clotti...

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  6. Read the tabel and answer the following questions. In which phylu...

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  7. In which phylum, organisms have haemoglobin in their blood ?

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  8. In which phylum, digestive system helps in transportation ?

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  9. Why do Arthropods have open circulatory system ?

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  10. Total number of valves in human heart are

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  11. Ramu got injured while playing Kabaddi. His blood clotted within 6 min...

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  12. Read the para : Now, fill the table with the above information.

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  13. Write a short note on Human Lymphatic System and its functions.

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  14. Observe the given diagram. Which type of cardiac cycle does it indicat...

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  15. In human body "A" is a pumping organ. From lungs blood vessel "B" with...

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  16. What blood vessels are (i) B (ii) E (iii) F and (iv) I ? Write their n...

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  17. What chambers are (i) C (ii) D ?

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  18. What blood vessels are (i) B (ii) E (iii) F and (iv) I ? Write their n...

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  19. Write about the blood vessels that bring blood to human heart.

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  20. What is blood pressure ? How is it measured ?

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  21. What is the need of special tissues or organs for transport of substan...

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