peripheral nervous system

1. ANATOMY
NAME
MUHAMMAD AFTAB
ROLL NUMBER
6907
TOPIC
PEPRIPHERAL NERVOUS SY STEM
ASSIGN BY
MAM SHEEZA JAHANGIR

2. Peripheral
Nervous System
The peripheral nervous
system consists of
the nerves that branch out
from the brain and spinal
cord. These nerves form
the communication
network between the CNS
and the body parts.

3. Division of PNS
The peripheral nervous system is
divided into the somatic nervous
system and the autonomic nervous
system.

4. Somatic Nervous
System
The somatic nervous system is the part of
the peripheral nervous system associated
with the voluntary control of body
movements via skeletal muscles.
COMPOSITION
The somatic nervous system consists of
afferent nerves or sensory nerves, and
efferent nerves or motor nerves.

5. FUNCTION OF SNS
The primary function of the
somatic nervous system is to
connect the central nervous system
to the body's muscles and control
voluntary movements and reflex
arcs.

6. Autonomic
Nervous
System
The autonomic nervous system is
a component of the
peripheral nervous system that
regulates involuntary physiologic
processes including heart rate,
blood pressure, respiration,
digestion, and sexual arousal.
It contains three anatomically
distinct divisions: sympathetic,
parasympathetic and enteric.

7. Function of
Autonomic
System
It's function are controlling of;
I. Heart Beats
II. Digestion
III. Respiratory rate
IV. Pupillary response(contol
of blinking of eyes)
V. Urination
VI. Sexual arouse

8. Division of ANS(autonomic
nervous system)
Autonomic nervous system are
divided into three types which
given as follow.
1. The sympathetic nervous
system
2. The parasympathetic nervous
system
3. The enteric nervous system

9. SYMPHATIC NERVOUS SYTEM
The sympathetic nervous system prepares the body for
the “fight or flight” response during any potential danger.
Its contains chiefly adrenergic fibers and tends to depress
secretion.For example, the sympathetic nervous
system can accelerate heart rate, widen bronchial
passages, decrease motility of the large intestine,
constrict blood vessels, increase peristalsis in the
esophagus.

10. Function of
sympathetic
The sympathetic nervous
system's primary process is to
stimulate the body's fight or flight
response. It is, however, constantly
active at a basic level to maintain
homeostasis homeodynamics.

11. Parasymphathetic
Nervous System
The parasympathetic nervous
system inhibits the body from
overworking and restores the body to
a calm and composed state.
It is located in between the spinal
cord and the medulla. It primarily
stimulates the body’s “rest and
digest” and “feed and breed”
response.

12. FUNCTION
The parasympathetic nervous system is
responsible for the body's rest
and digestion response when the body is
relaxed, resting, or feeding. It basically
undoes the work of sympathetic division
after a stressful situation.

13. ENTERIC NERVOUS
SYSTEM
The enteric nervous system or
intrinsic nervous system is one of
the main divisions of the
autonomic nervous system and
consists of a mesh-like system of
neurons that governs the function
of the gastrointestinal tract.

14. FUNCTION
OF ENTRIC
NERVOUS
SYSTEM
The enteric nervous system
regulates
the movement of water and
electrolytes between the gut
lumen and tissue fluid
compartments. It does this by
directing the activity of
secretomotor neurons that
innervate the mucosa in the
small and large intestines and
control its permeability to ions.

15. PERIPHERAL NERVE
The nerves that branch out
from the brain and spinal
cord. These nerves form the
communication network
between the CNS and the
body parts.
FUNCTION OF
PERIPHERAL NERVE
These nerves control the
functions of sensation,
movement and motor
coordination. They are
fragile and can be damaged
easily.

16. MAJOR
PERIPHERAL
NERVE
controlling musclesand accessorystructures of the eyes
PRIMARILY NERVE
(Olfactory)- for the sense of smell (sensory). (Optic)- for the sense of
vision (sensory). (Oculomotor)-for controlling muscles and
accessory (Oculomotor)-
SENSORY NERVE

17. GANGLIA
Ganglia are ovoid structures
containing cell bodies of neurons and
glial cells supported by connective
tissue.
FUNCTION
Ganglia function like relay stations -
one nerve enters and an other exits.
The structure of ganglia is illustrated
by the example of the spinal ganglion.

18. GANGLIA LOCATION
In vertebrates the ganglion is a cluster
of neural bodies outside the
central nervous system. A
spinal ganglion, for instance, is a
cluster of nerve bodies positioned
along the spinal cord at the dorsal and
ventral roots of a spinal nerve.