HUMAN ANATOMY
AND PHYSIOLOGY-II
UNIT 1 NOTES
NERVOUS SYSTEM -"
• NEURONS
• NEUROGLIA
f
• ACITON POTENTIAL IMPERFECT
• BRAIN PHARMACY
• SPINAL CORD
CONNECT WITH US ON :
[C!J] @IMPERFECTPHARMACV
e IMPERFECT PHARMACY
, NERVOUS SYSTEM
• 1ht ()etruous svstem IS -th~ roost complex svstem of huma.n ~
cont~·mn3 mtlhon'-> of ne-rue celfs network .
• ]- IS -\tie ro~mr controlling anq coorcHnaling ~vst€1Yl of huroo.n booy .
• ]- ,·s -fue bod,y 's ·commafld cent"6e .
• The nwous 5\/steffl is -the m~or amtrnn,·ns I r~utato~y and COmmurncoh~
5'1s\6n in the body_ .
• ] ts -\be C0'1 \fe. of oll -\he mento.J acl1vitfes i'nc\ud1n3 -tho':Qht ,
\earnin3 , rnem<m/ .
• ]J is also res~ns1bk for mat'nfo.J°nir~~l homrosfasis .
Or~anisatfon / C\asstf1cal1on of Nervoo.& Svstern
·. r
,•
NEffvous S'/SiEM
CENTRAL NERVOUS 5'1STEt1 PERIPHERAL NERVOUS S'ISTE~
B~o.in
Spinol C01d Autonomic NS Somo.h'c NS
5~mpattieHc
POJosympothehc
, CeHs of Nervous system
lhere Of! bast'cmty +wo t,pes of ceHs rn n~ous svsfem .
(D Neurons ( Nerve Cell~)
® Neuro_!llta ( 6'hot Cells)
I NEURONS I
• Neurons ore ihe basic strocturoJ and .-fundtonaJ urnl of nwous svstem .
• To~~ ~nero.\-es , co.rn, and 1mnsmi+ rlewe impulses .
• ]- ls also known as Neroe (ens .
S\rudore of Neurons
A Neuron ,·s basicoHv cornpo!af of -lhree parfs ·
CD (e\\ Bod~
® Dendrites ·
Dendrites Axon "amino.ts
@ Axon
NevroplOSf'\
Axo\ernma
t1'fe\in Shealh
Missie's
Cell Bochf Gtranoles Schu,ann CeH
Meurofemma
, ICELL 8oov I
•n tsalso "'1own as SomQ .
• The cell body 1s -fhc centfo.l r~i'on conta.t'nin9 nucleu'-> is the sik
of all m9io~ meto.bo\lic adfvrtt, of cell .
• Jt is approx i.- \OO mt'cromefetS" t'n dra~elf .
• lhe -o,top\osrn of neuron is known a~ Neoroplasm.
• The ribosomes of neuron~ ,·s ca1tEq Q~ Nissie's Gnonule& .
• Dendrites and Axons are nottiin_Q but th, eXfells,·on& of cell ~ .
IAXON I
• Axon ts Q#t'n , \on9 and cyl1od1rirol process/ e~ension that an·se. _
from -\he cell bod~ of Neuron .
• A~ons are the most t'mpodant p:irt of neuron -that can-y and
-kansmH nerue impulses from one neuroo to othe1r .
• G,eneroHy most of -the axons are cou~e~ by a -{atty substance called
Myelin Sheath which .,·s ·furftrer wrappeq by Schwonn C'etls .
• The area of axo·n where myeh'o shectH, is absen~ 1:S known as
Nodt of RClflvietr .
• 1rt stk from wht'ch axon i's extended from cell bcdy 1s known
a~ Axon Hillock .
lne. end ~ of axon 1s; R1own a~ Axon Terminal .
IDENDRITES I
• Dendrites ore o.lso the. exkns1ons .of ce\l bocJ.y tho.~ rece1\res sHmu.lus
or newe. impulses from other neuron.& and fends them fc the cell
body.
AND PHYSIOLOGY-II
UNIT 1 NOTES
NERVOUS SYSTEM -"
• NEURONS
• NEUROGLIA
f
• ACITON POTENTIAL IMPERFECT
• BRAIN PHARMACY
• SPINAL CORD
CONNECT WITH US ON :
[C!J] @IMPERFECTPHARMACV
e IMPERFECT PHARMACY
, NERVOUS SYSTEM
• 1ht ()etruous svstem IS -th~ roost complex svstem of huma.n ~
cont~·mn3 mtlhon'-> of ne-rue celfs network .
• ]- IS -\tie ro~mr controlling anq coorcHnaling ~vst€1Yl of huroo.n booy .
• ]- ,·s -fue bod,y 's ·commafld cent"6e .
• The nwous 5\/steffl is -the m~or amtrnn,·ns I r~utato~y and COmmurncoh~
5'1s\6n in the body_ .
• ] ts -\be C0'1 \fe. of oll -\he mento.J acl1vitfes i'nc\ud1n3 -tho':Qht ,
\earnin3 , rnem<m/ .
• ]J is also res~ns1bk for mat'nfo.J°nir~~l homrosfasis .
Or~anisatfon / C\asstf1cal1on of Nervoo.& Svstern
·. r
,•
NEffvous S'/SiEM
CENTRAL NERVOUS 5'1STEt1 PERIPHERAL NERVOUS S'ISTE~
B~o.in
Spinol C01d Autonomic NS Somo.h'c NS
5~mpattieHc
POJosympothehc
, CeHs of Nervous system
lhere Of! bast'cmty +wo t,pes of ceHs rn n~ous svsfem .
(D Neurons ( Nerve Cell~)
® Neuro_!llta ( 6'hot Cells)
I NEURONS I
• Neurons ore ihe basic strocturoJ and .-fundtonaJ urnl of nwous svstem .
• To~~ ~nero.\-es , co.rn, and 1mnsmi+ rlewe impulses .
• ]- ls also known as Neroe (ens .
S\rudore of Neurons
A Neuron ,·s basicoHv cornpo!af of -lhree parfs ·
CD (e\\ Bod~
® Dendrites ·
Dendrites Axon "amino.ts
@ Axon
NevroplOSf'\
Axo\ernma
t1'fe\in Shealh
Missie's
Cell Bochf Gtranoles Schu,ann CeH
Meurofemma
, ICELL 8oov I
•n tsalso "'1own as SomQ .
• The cell body 1s -fhc centfo.l r~i'on conta.t'nin9 nucleu'-> is the sik
of all m9io~ meto.bo\lic adfvrtt, of cell .
• Jt is approx i.- \OO mt'cromefetS" t'n dra~elf .
• lhe -o,top\osrn of neuron is known a~ Neoroplasm.
• The ribosomes of neuron~ ,·s ca1tEq Q~ Nissie's Gnonule& .
• Dendrites and Axons are nottiin_Q but th, eXfells,·on& of cell ~ .
IAXON I
• Axon ts Q#t'n , \on9 and cyl1od1rirol process/ e~ension that an·se. _
from -\he cell bod~ of Neuron .
• A~ons are the most t'mpodant p:irt of neuron -that can-y and
-kansmH nerue impulses from one neuroo to othe1r .
• G,eneroHy most of -the axons are cou~e~ by a -{atty substance called
Myelin Sheath which .,·s ·furftrer wrappeq by Schwonn C'etls .
• The area of axo·n where myeh'o shectH, is absen~ 1:S known as
Nodt of RClflvietr .
• 1rt stk from wht'ch axon i's extended from cell bcdy 1s known
a~ Axon Hillock .
lne. end ~ of axon 1s; R1own a~ Axon Terminal .
IDENDRITES I
• Dendrites ore o.lso the. exkns1ons .of ce\l bocJ.y tho.~ rece1\res sHmu.lus
or newe. impulses from other neuron.& and fends them fc the cell
body.
