In earthworms,the nervous system is composed | vedclass

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Question

(A) The nervous system of the earthworm $(Pheretima)$ is essentially represented by ganglia arranged segment-wise on the ventral paired nerve cord.$1$

Vedclass · Accepted Answer

Cerebral ganglia and a double ventral nerve cord

Vedclass · Answer

(A) The nervous system of the earthworm $(Pheretima)$ is essentially represented by ganglia arranged segment-wise on the ventral paired nerve cord.$1$. The nerve cord in the anterior region (3rd and 4th segments) bifurcates,laterally encircling the pharynx and joins the cerebral ganglia dorsally to form a nerve ring.$2$. The cerebral ganglia,along with other nerves in the ring,integrate sensory input and command muscular responses.$3$. Therefore,the nervous system consists of cerebral ganglia and a double ventral nerve cord.

In earthworms,the nervous system is composed of which of the following?

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