Explain the structure of nerve

1.	Explain the structure of nerve
Answer» 1. Each spinal nerve consists of many axons and contains layers of protective connective tissue coverings. 2. Axons are enclosed in a fatty sheath called myelin sheath. 3. Individual axons within a nerve are wrapped in an endoneurium (innermost layer). 4. Groups of axons with their endoneurium are arranged in bundles called fascicles. 5. Each fascicle is wrapped in perineurium (middle layer). 6. The outermost covering over the entire nerve is the epineurium. The epineurium extends between fascicles. 7. Many blood vessels nourish the nerve and are present within the perineurium and epineurium.

Answer»

1. Each spinal nerve consists of many axons and contains layers of protective connective tissue coverings.

2. Axons are enclosed in a fatty sheath called myelin sheath.

3. Individual axons within a nerve are wrapped in an endoneurium (innermost layer).

4. Groups of axons with their endoneurium are arranged in bundles called fascicles.

5. Each fascicle is wrapped in perineurium (middle layer).

6. The outermost covering over the entire nerve is the epineurium. The epineurium extends between fascicles.

7. Many blood vessels nourish the nerve and are present within the perineurium and epineurium.

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