The nervous system of the frog includes –
- Central nervous system – it includes brain and spinal cord.
- Peripheral nervous system – It includes a pair of ganglionated chains situated on both the sides of the vertebral column.
There are 10 pairs of cranical nerves and 9 pairs of spinal nerves in the frog.
The brain is an elogated white structure which is enclosed in a cranium made up of skull bones. The brain is divisible into three parts viz. – Fore brain. Mid brain and Hind brain.
The fore brain includes a pair of olbactory lobes, a pair of cerebral hemispheres and one diencephalon. Both the cerebral hemispheres are collectively called as cerebrum.
The mid brain consists of a pair of optic lobes. They are hollow and their cavities are called as optocoel.
The hind brain is made up of one cerebellum and one medulla oblongata.