Question

Fill in the blanks

3. White matter mainly consists of _____.

Answer 1

Substances of the nervous system

1. The nervous system comprises mainly neurons.
2. Based on the color appearance, the nervous system is made of two substances- grey matter and white matter.

White matter

1. The white matter comprises nerve fibres (axons and dendrites) of the neurons.
2. The appearance of the white color is due to the coating of the myelin sheath on the axonal portions of the neurons.

Final answer

White matter mainly consists of nerve fibres.