Earthworms during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton because

Options

(a) coelomic fluid
(b) blood
(c) gut peristalsis
(d) setae

Correct Answer:

coelomic fluid

Explanation:

Earthworms have no skeleton but during burrowing, anterior end becomes turgid and acts as a hydraulic skeleton. It is due to coelomic fluid. The coelom is filled with an alkaline milky coelomic fluid. This coelomic fliud contains water, salts, proteins and 4 types of cells namely amoebocytes, mucocytes, circular cells and chloragogen cells