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HISTORY OF NEURONS:
It was first
discovered by a famous scientist
“Santiago Ramon” in year 1888.
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Santiago was born in “Spain” in 1852 and died in
1934.

Neurons:
is the basic functional and
structural unit of the nervous system .
 Also known as “Nerve Cell”.
 Carries Electric Impulses.
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Structure Of Neuron:
Consists of the
following parts;
 CELL BODY.
 DENDRON.
 AXON.
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CELL BODY:
It consists of cytoplasm,
Nucleus and other cell organelles.
 Its function is to collect information
from dendrites.
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Dendron:
They basically arise from cell
body.
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 One or more short processes of
dendron are called “Dendrites.”
 Its function is to bring impulses
towards the cell body.
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Axon:
It is single long fiber that arises
from the cell body. (as shown in the
diagram.)
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 Axons of large neurons is covered by a
white sheath called “Myelin Sheath”.
 The distance between two nodes is
called “Schwann cell”.(as shown in the
diagram.)
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 Axon’s function is to receive nerve
impulse from the cell body
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Types Of Neurons:
There are three
types of neurons.
 Sensory Neurons.
 Motor Neurons.
 Associative Neurons.
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 SENSORY NEURON:
It carry nerve impulse
from the receptor (sense organs) to CNS.
 MOTOR NEURON:
It carries nerve impulse
from the CNS to the effectors (muscles and
glands)
January 23, 2019PAC PESHAWAR. 1215

 ASSOCIATIVE NEURON:
They are
present in brain and spinal cord. They
link the sensory neuron’s with motor
neuron’s.
January 23, 2019PAC PESHAWAR. 1216

That’s The End Of My Presentation
“THANK YOU”
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Neurons

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