Question
Biology Question on Classification Of Animals
Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
A
coelomic fluid
B
blood
C
gut peristalsis
D
setae
Answer
coelomic fluid
Explanation
Solution
The body cavity (coelom) of earthworm is filled with an alkaline, colourless or milky coelomic fluid containing water, salts some proteins and four types of coelomic corpuscles, i.e., phagocytes, mucocytes, circular nucleated cells and chloragogen cells. During burrowing, the coelomic fluid becomes turgid and acts as hydraulic skeleton.