Classify peripheral nervous based on the...

Classify peripheral nervous based on the nerves arising from the brain and the spinal cord.

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Peripheral nervous system is formed by the nerves arising from the brain and the spiN/Al cord. The nerves arising from the brain are called cranial nerves. Nerves arising from spiN/Al cord are called spiN/Al nerves.
Cranial Nerves: In man, there are 12 pairs of cranial nerves. Some of the cranial nerves are sensory Eg: optic nerve which innervates the eye> Some are motor nerves which helps in rotation of eyeball. It also innervates the eye muscles, muscles of iris and tear gland.
SpiN/Al Nerves: There are 31 pairs of spiN/Al nerves. Each spiN/Al nerve has a dorsal sensory root and the ventral motor root. The direction of impulses in dorsal spiN/Al root is towards the spiN/Al cord and in ventral spiN/Al root away from the spiN/Al cord.

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Peripheral neurons system is formed by the nerves arising from the_____.

Brain and the spinal cord.

Diorsal or afferent root.

Ventral or efferent root.

Spinal nerves.

There are …...... Pairs of spinal nerves emerge out from the spinal cord.

The spinal nerves emerge out from the spinal cord through spaces called:

foramen of Monro

intervertebral foramina

aqueduct of sylvium

synapse