a general introduction of nervous system is given here with its function and parts.

1. GUIDED BY- PRESENTED BY-
Dr. ARVIND SHUKLA SONIYA BARCHE

2.  INTRODUCTION
 NEURON CELL
 HUMAN NERVOUS SYSTEM
CENTRAL NERVOUS SYSTEM
PHERIPHERAL NERVOUS SYSTEM
AUTONOMOUS NERVOUS SYSTEM
 FUNCTION OF NERVOUS SYSTEM
 CONCLUSION
 REFERENCES

3. INTRODUCTION
THE SYSTEM WHICH RECEIVES THE STIMULUS,
TRANSMITS IT TO THE OTHER PARTS OF THE
BODY& THE CORRESPONDING EFFECTS ARE
SHOWN, ARE CALLED NERVOUS SYSTEM.
IT CONSTITUTES ABOUT 2.4% OF TOTAL BODY
WEIGHT.
IT LINKS THE VARIOUS ORGANS & SYSTEM,CO-
ORDINATES ALL THEIR ACTIVITIES & ENSURES
THE INTEGRITY OF THE ORGANISM.
THE BRANCH OF BIOLOGY ,DEALS WITH THE
STUDY OF NERVOUS SYSTEM CALLED
NEUROLOGY.

4. NEURON CELL
STRUCTURAL & FUNCTIONAL UNIT OF
N.S.,HUMAN NERVOUS SYSTEM HAS ABOUT 100
BILLION NEURONS.FULLY FORMED NEURON
NEVER DIVIDE.
NEURON IS COMPOSED OF MAINLY CYTON &
PROCESS OF NEURON.
THE REGION WHERE THE AXON OF ONE NEURON
JOINS WITH THE DENDRITES OF ANOTHER
NEURON IS CALLED AS SYNAPSE.
DEPENDING UPON THE NO. OF PROCESSES THE
NEURONS ARE UNIPOLAR,BIPOLAR,MULTIPOLAR.

5. NEURON CELL

6. NERVOUS
SYSTEM
PERIPHARAL AUTONOMIC
CENTRAL N.S.
N.S. N.S.
SYMPA- PARASYM-
SPINAL CRANIAL SPINAL
BRAIN THETIC PATHETIC
CORD NERVES NERVES
N.S. N.S.

7. BRAIN-
IT IS UPPER & BROADER PART LYING IN THE HEAD.
IN ADULTS,IT WEIGHTS ABOUT 1400gm &
HAS 100BILLION NEURON.
THE BRAIN IS COVERED BY THREE MEMBRANOUS COVERING
(OUTER DURA MATER,MIDDLE ARACHNOID,INNER PEA
MATER) CALLED MENINGES.
THE BRAIN FORMS ABOUT 98% OF THE WEIGHT OF WHOLE
C.N.S.IT IS MADE UP OF FOLLOWING 3 PARTS-
FORE BRAIN- CEREBRUM,DIENCEPHELON,OLFACTORY LOBE
MID BRAIN - CEREBRAL PEDUCLE,CORPORA QUADRIGEMINA
HINDBRAIN - CEREBELLUM,PONS,MEDULLA OBLONGATA

10. SPINAL
CORD
LIKE BRAIN,SPINAL CORD IS ALSO
SURROUNDED BY MENINGES THE SPACE
BETWEEN THESE MEMBRANE IS FILLED WITH
CEREBROSPINAL FLUID
THE LENGTH OF SPINAL CORD IN HUMAN
MALES IS 45 CM AND IN FEMALE 43 CM
THE SPINAL CORD IS CONSIST OF CENTRAL
CANAL SURROUNDED BY A CENTRAL CORE
OF GARY MATTER.

11. Peripheral nervous system is formed of
nerves extending between the central
nervous system & receptor or effectors
organs, having 2 types of nerves-
 Cranial nerves – 12 pairs, originating from
brain& terminate at various effectors
organ.
 spinal nerves –there are 31 pairs of spinal
nerves which arise from the spinal cord.

13. AUTONOMOUS NERVOUS SYSTEM
IT IS A SELF GOVERNING NERVOUS SYSTEM. IT
HAS BOTH SENSORY & MOTOR NERVES.IT
DISTINGUISHED INTO 2 SYSTEM-
 SYMPAHTATIC NERVOUS SYSTEM
 PARASYMPATHETIC NERVOUS SYSTEM

15. FUNCTION
IT REGULATES &CONTROLES THE VARIOUS ACTIVITIES OF
THE ORGAN & FINALLY THE ORGANISM AS A WHOLE.FOR
EX:SENSE OF VISION ,HEARING,MUSCULAR CONTRACTION
,HEART BEAT.
IT REGULATES THE INTERNAL ENVIRONMENT OF THE
BODY BY COORDINATING THE WORKING OF THE VARIOUS
GLANDS & TISSUES OF BODY.
HELPS THE ORGANISM TO REACT TO THE EXTERNAL
ENVIRONMENTAL CHANGES.
STORES THE MEMORY OF THE PAST & PRESENT
EXPERIENCES.
PRODUCE SENSATION LIKE
VISION,HEARING,TASTE,SMELL
PLASURE & PAIN WITH HELP OF SENSE ORGANS
ATTACHED TO THEM.

16. CONCLUSION
IN A COMPLEX ORGANISM THE NERVOUS
SYSTEN PLAYS THE LEADING ROLE IN
REGULATING ALL THE PHYSIOLOGICAL
PROCESSES & IN AFFECTING THE CONNECTIONS
OF THE ORGANISM WITH THE EXTERNAL
ENVIRONMENT.
IT ALSO LINKS THE VARIOUS ORGAN & SYSTEM,
COORDINATES ALL THEIR ACTIVITIES &
ENSURES THE INTEGRITY OF THE ORGANISM.
THE NERVOUS SYSTEM IS COMPOSED OF
NERVOUS & THE GLIAL CELL.
THE NERVOUS SYSTEM IS CONSIST OF THREE
PARTS:-C.N.S.,P.N.S.,A.N.S..

17. REFERENCES
GUYTON,A.C. & HALL,J.E.,2000 A TEXT
BOOK OF MEDICAL PHYSIOLOGY
GANONG,H. 2003,REVIEW OF MEDICAL
PHYSIOLOGY