Central nervous system consists of .............. and............... .

Visceral nervous system comprises of

Autonomic nervous system cosists of

Vertebrate nervous systems are divided into two major divisions : the central nervous system, which includes the ................, and ......................, and the nervous system, which includes all neurons other than those in the brain and spinal cord.

Each sensory system consists of:

The ground tissue system consists of -

Units of nervous system are

Units of nervous system are

The somatic nervous system controls

The "nervous system " of Hydra consists of

The nerves carrying impulse messages from the central nervous system to the effectors are called ............. while those carrying sensory messages to the central nervous system are called ................