Spinal cord controls ________ action.

________ is a very complex system in the human body.

 _____ is the control centre of the nervous system.

_______ connect the sense organs to the brain.

The membranous covering of the brain is called ________.

The brain stem is also known as _____.

________ is the largest region of the brain.

The longest fibre of a neuron is called _______.

_______ is the basic building block of the nervous system.

Central canal of spinal cord is surrounded by an H-shaped area called _____