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Earthworms have no skeleton but during b...

Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to

A

gut peristalsis

B

setae

C

coelomic fluid

D

blood

Text Solution

Verified by Experts

The correct Answer is:
C
Hydraulic skeleton is the system of support found in soft bodied invertebrates, which relies on the incompressibility of fluids contained within the body cavity. In earthworms, the coelomic fluid is under pressure within the coelom and therefore provides support for internal organs, Due to hydraulic skeleton, during burrowing, the anterior end becomes turgid and aids in relaxation of longitudinal muscles.
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NCERT FINGERTIPS ENGLISH-STRUCTURAL ORGANISATION IN ANIMALS-Structural Organisation In Animals
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  2. Nerve cell do not divide because they do not have

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  3. Earthworms have no skeleton but during burrowing, the anterior end bec...

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  4. Which of the following layers you will find in the body wall of earthw...

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  5. Pheretima and its close relatives derive nourishment from

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  6. Given is the figure of alimentary canal of earthworm. Select the optio...

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  7. Which part of the alimentary canal of earthworm (in the given figure) ...

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  8. One very special feature in the earthworm is that

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

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  10. Which of the following is absent in the coelomic fluid of earthworm ?

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  11. The lateral hearts in earthworm

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  12. Blood vessels in Pheretima, which have valves are

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

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

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

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  16. Primary function of enteronephric nephridia of Pheretima is

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

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

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  19. Which of the following is incorrect fot Pheretima ?

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

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