Question

a)Which nerve is labelled as ‘X’?
b)The nerve from the spinal cord, which reaches the muscles in the leg is mixed. Give reason.

Answer 1

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A spinal nerve is a mixed nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body. In the human body there are 31 pairs of spinal nerves, one on each side of the vertebral column. These are grouped into the corresponding cervical, thoracic, lumbar, sacral and coccyges regions of the spine.[1] There are eight pairs of cervical nerves, twelve pairs of thoracic nerves, five pairs of lumbar nerves, five pairs of sacral nerves, and one pair of coccyges nerves. The spinal nerves are part of the peripheral nervous system.

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