What is the nerve cell. Explain with diagram


Nerve cells or neurons are the cells of nervous system.They perform the function of transmission of signals and  has the following components:

1) Cell body or cyton: It is the broad, rounded part of the neuron which contains nucleus, cytoplasm and various cellular organelles. It also contains Nissl granules.

2) Dendrites: These are fine, short and branched protoplasmic processes of the cell body that pick up the sensations and transmit them to the cell body.

3) Axon: It is a long fibre-like cytoplasmic process that carries impulses away from the cell body. Axon is branched terminally and the terminals are often knob-like. Axons are generally covered by a myelin sheath. 

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