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Blood vessels in Pheretima, which have v...

Blood vessels in Pheretima, which have valves are

A

dorsal

B

ventral

C

supra-oesophageal

D

lateral oesophageal

Text Solution

Verified by Experts

The correct Answer is:
A
Blood vessels of Pheretima, which have valves are dorsal. Blood passes from backward to forward direction. To prevent the backward flow of the blood, valves are present infront of each septum.
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NCERT FINGERTIPS-STRUCTURAL ORGANISATION IN ANIMALS-Structural Organisation In Animals
  1. Which of the following is absent in the coelomic fluid of earthworm ?

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  2. The lateral hearts in earthworm

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  3. Blood vessels in Pheretima, which have valves are

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  4. In Pheretima, there are red coloured round bodies in 4^(th),5^(th) and...

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  5. The figure showing nephridial system of earthworm is given here. Ident...

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  6. Which of the following statements is correct about excretion in earthw...

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  7. Primary function of enteronephric nephridia of Pheretima is

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  8. Which of the following statements is incorrect about the nervous syste...

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  9. Which of the following structures is correctly matched with its descri...

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  10. Which of the following is incorrect fot Pheretima ?

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  11. In the given diagram of the reproductive system of earthworm, Identify...

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  12. Which one of the following structures in Pheretima is correctly matche...

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  13. Match column I with column II and select the correct option from the c...

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  14. The given figure represent heat region of cockroach. In which one of t...

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  15. Which of the following figures shows the mandibles of cockroach ?

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  16. In the mouth parts of a cockroach, the labium forms ul("I") whileul("i...

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  17. Complete the following flowchart by selecting the correct option

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  18. In the given diagram of a leg of cockroach, parts have been indicated ...

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  19. The given figure represents posterior region of male cockroach. Indent...

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  20. Male cockroach differs from female cockroach in having

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