Question

Describe the T.S. of spinal cord.

Answer 1

The spinal cord (in yellow) connects the brain to nerves throughout the body. The spinal cord is a long, thin, tubular structure made up of nervous tissue, that extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column.




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Answer 2

T.S of the spinal cord:

• The shape of the spinal cord is cylindrical but in dorso ventral direction it appears flattened.
• It is covered by three layers namely Dura mater, arachnoid mater and pia mater externally.

• It posses two fissures namely deep ventral and shallow dorsal.  

• Dorsal septum extends from the dorsal fissure and posses a cavity called the central canal.

• It is lined by ependymal cells and is located in the 4th ventricle of the brain and is composed of cerebro-spinal fluid.

• The surrounding region of the central canal is found with grey matter.

• The grey matter gives ‘H’ shaped appearance due to the presence of two horns like structures present in dorsolateral as well as ventrolateral regions.

• The grey matter is enclosed by the white matter which gives a three- layered arrangement called funiculi in all three directions.