Name the nervous system formed by the chain of ganglia on either side of vertebral column.

Somatic nervous system is formed by

Primitive nervous system is formed in

Primitive nervous system is formed in

Primitive nervous system is formed in

Primitive nervous system is formed in

Primitive nervous system is formed in

Name the following Two bean-shaped organs located on either side of vertebral column, on the posterior side of abdomen in human.

Primitive nervous system is formed in …………………. .

Name the components of nervous system.

The nervous system of vertebrates is derived from :