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Question
Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
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Solution
The correct option is C Coelomic fluid
When earthworms burrow through the soil, they do so by coordinated contractions of the longitudinal and circular muscle bands that lie in the body wall. These contractions are made possible by the segments being kept turgid by the coelomic fluid, although there is no movement of the fluid across the septa between segments when peristaltic waves pass along the body. If coelomic fluid moved along the body, it would be difficult for one end of the worm to contract and the other to expand.
So, the correct answer is 'Coelomic fluid'
When earthworms burrow through the soil, they do so by coordinated contractions of the longitudinal and circular muscle bands that lie in the body wall. These contractions are made possible by the segments being kept turgid by the coelomic fluid, although there is no movement of the fluid across the septa between segments when peristaltic waves pass along the body. If coelomic fluid moved along the body, it would be difficult for one end of the worm to contract and the other to expand.
So, the correct answer is 'Coelomic fluid'
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