Question

The nature of all the 31 pairs of spinal nerves is

Answer 1

ANSWER:

In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body. ... One, composed of sensory fibres, enters the spinal cord via the dorsal root; its cell bodies lie in a spinal ganglion that is outside the spinal cord.

Answer 2

The nature of all 31 pairs of spinal nerve is mixed nerves.

Explanation:

• Each spinal nerve is a mixed nerve i.e they have both sensory and motor nerves formed from its dorsal and ventral roots.
• The dorsal root is sensory root and carries sensory information to the brain.
• The ventral root is the motor root and carries motor information from the brain to the receptor part for action.
• Spinal nerves are in 31 pairs-

1. 8 cervical
2. 12 thoracic
3. 5 lumber
4. 5 sacral
5. 1 coccygeal

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