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When does the heart beat start in the hu...

When does the heart beat start in the human embryo?

A

`21^(st)` day

B

`22^(nd)` day

C

`20^(th)`

D

`23^(rd)`

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BEYOND PUBLICATION-TRANSPORTATION - THE CIRCULATORY SYSTEM-EXERCISE
  1. When the valves between the artria and ventricle are closed forcibly w...

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  2. Paeudocoelom has taken up the function of collection and distribution ...

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  3. Name the mamals that scratch the bark of trees to get food stored in t...

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  4. When does the heart beat start in the human embryo?

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  5. What is the time taken for the supply of 1ml of blood from heart to a ...

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  6. Lymph is the substance that contains

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  7. What plays an important role in the absorption of water?

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  8. Cardiac output means, the amount of blood pumped out in

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  9. Marcello Malpighi studied………………and discovered the micro blood vessels ...

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  10. Hypertension is due to

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  11. What are the first Eucoelomate animals?

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  12. The septum that divides the two ventricles can be named as……………..

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  13. Gastrovascular cavity is developed in animals like

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  14. B.P. will change according to the activity

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  15. This shows

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  16. Write about the role of Thrombokinase in clotting of blood.

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  17. I am an enzyme. I secreted from the blood platelets. I start the proce...

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  18. 'The normal B.P in man is 120/80 mm/Hg'' What does 80 in the valve rep...

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  19. Write the self defence system in the bodies of animals and plants.

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  20. How scientists prove that the food is trasnsported through the phloem?

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