If a live earthworm is pricked with a needle on it outer surface without damaging its gut, the fluid that comes out is:

  • Option 1)

    Coelomic fluid

  • Option 2)

    haemolymph

  • Option 3)

    slimy mucus

  • Option 4)

    excretory fluid

 

Answers (1)

 

Coelom of earthworm -

The earthworm has schizocoem type. The coelom of the 1st four segments is continuous or undivided.

- wherein

From 4th and 5th segment, the coelom is divided by septa.

 

 The body cavity of an earthworm is true coelom (schizocoelous) as it is formed by the division of mesoderm. The coelomic fluid contains different types of corpuscles. Thus, if the alive earthworm is prickled with a needle on its outer surface, the coelomic fluid will come out.


Option 1)

Coelomic fluid

This solution is correct 

Option 2)

haemolymph

This solution is incorrect 

Option 3)

slimy mucus

This solution is incorrect 

Option 4)

excretory fluid

This solution is incorrect 

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