Advertisements
Advertisements
प्रश्न
Describe T.S. of the spinal cord.
Advertisements
उत्तर
T.S. of the spinal cord shows the following features:
- The spinal cord is externally covered by the three meninges (dura mater, arachnoid mater, and pia mater). It is cylindrical but dorsoventrally flattened.
- It shows deep ventral fissure and shallow dorsal fissure. From the dorsal fissure, there extends a thin sheet of connective tissue called the dorsal septum which extends inward.
- It shows a central space called the central canal. The central canal is continuous with the 4th ventricle of the brain and contains cerebrospinal fluid. The central canal is lined by a single layer of ependymal cells. The central canal is surrounded by inner, grey matter containing cytons or cell bodies of neurons.
- Two dorsolateral horns and two ventrolateral horns give an ‘H’-shaped appearance to the grey matter. Dorsal horns extend in dorsal roots, while ventral horns extend in ventral roots of spinal nerves. Grey matter is surrounded by the white matter which divides into three columns or funiculi on either side. These are dorsal funiculi, lateral funiculi and ventral funiculi.
APPEARS IN
संबंधित प्रश्न
Differentiate between following pair with reference to the aspect in bracket.
cerebrum and spinal cord (arrangement of cytons and exons of neurons).
Where is this located?
Meninges
Give Technical Term:
The fluid which fills the central canal of the spinal cord.
Mention, if the following statement is True or False
Spinal nerves are twelve pair
Identify the odd item from the following series of words.
Sketch and label T. S. of Spinal cord.
Spinal cord is enclosed in ____________ of vertebral column.
Explain the formation of a typical spinal nerve with the help of a neat labelled diagram.
Given below is the transverse section of the spinal cord. Read the information below the diagram and fill in the blanks:
The spinal cord extends from the medulla oblongata of the brain and runs down through the whole length of the vertebral column. The spinal cord is covered by the meninges. It conducts impulses from the skin and muscles to the brain. It also conducts impulses from the brain to the muscles of the trunk and limbs.
The spinal cord is a part of the (a) ______ Nervous System. The grey matter in the picture given above consists of (b) ______ while the white matter consists of (c) ______. The spinal cord is concerned with the (d) ______ actions below the neck. (e) ______ is the bony structure that protects the spinal cord.
Mention where in the human body is the following located and state its main function:
Central canal
