Question

What is spherical nervous syatem

Answer 1

Nervous system. ... Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago. In vertebrates it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord.

Answer 2

Answer:It consists of the central nervous system; the brain and spinal cord, and the peripheral nervous system; the sense organs, cranial and spinal nerves, and their branches. ... They are rounded masses which make contact anteriorly with the spherical olfactory sacs, the organs of smell.