How Many Spinal Nerves are There? There are 31 pairs of spinal nerves, each pair is attached to a part of spinal cord called spinal segment. The 31 pairs of spinal nervesRead More…
05Jul/18
Neuroglial Cells
What are neuroglial cells? Besides neurons, the other type of cells present in nervous system are glial or neuroglial cells.These cells form myelin, protect and support neurons.They are far more numerous than neuronsRead More…
Myelin and Neurilemma Sheaths
Describe in brief the myelin sheath and neurilemma? Myelin Sheath It is a laminated sheath made up of lipoproteins. Myelin sheath is formed by consecutive wrappings of Schwann cell membrane around theRead More…
Nervous System – Functions and Subdivisions
What are the functions of Nervous System? Gathers information both from the outside world and from inside the body- SENSORY FUNCTION Transmits the information to the processing area of the brain andRead More…
Neurons – Structure and Classification
Describe the structure of Neuron. The structural and functional unit of the nervous system is the nerve cell or neuron. Approximately 100 billion neuron are present in the nervous system.They are highlyRead More…
Capillaries and Sinusoids
Describe Capillaries. Capillaries They are the smallest vessels, their avarage diameter is ` 8 µm. Referred as exchange vessels , because they are involved in exchange of gases nutrients and metabolites betweenRead More…
End Arteries, Anastomosis and Collateral Circulation
What are true/anatomical and functional end arteries? True/anatomical end arteries are those arteries that do not have precapillary anastomoses with their neighbouring arteries. In case of blockage of an end artery dueRead More…
Components of Vascular System and Types of Circulation
What are the components of the vascular system? Components of vascular system Cardiovascular system includes heart, arteries, arterioles, capillaries, venules and veins. What are the different types of circulation? There are threeRead More…
Cavernous Sinus
Where are Cavernous Sinuses located? Cavernous venous sinuses are paired dural venous sinuses located in the middle cranial fossa on either side of the body of sphenoid bone. They extend from the medialRead More…
Bone – Parts and Ossification
What are the parts of developing long bone? Parts of a developing long bone are: Epiphysis: The ends of long bones that ossify from the secondary centre of ossification are called epiphysis.Read More…