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

  1. A
    Setae
  2. B
    Coelomic fluid
  3. C
    Blood
  4. D
    Gut peristalsis

Solution & Step-by-step Explanation

Earthworms utilize a hydrostatic (hydraulic) skeleton. The pressure of the incompressible coelomic fluid within the segmented body cavity allows the worm to maintain its shape and exert the force necessary for burrowing.

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Earthworms have no skeleton, but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. This is due to:
A
Setae
B
Coelomic fluid
C
Blood
D
Gut peristalsis

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Animal KingdomStructural OrganisationEarthworm

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