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Organisation du système nerveux

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Comment s’organise le SN chez l’humain

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  • April 9, 2021
  • 3
  • 2020/2021
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L' du 5
organisation
Le sn est le de communication le plus important de l' o
moyen
transmettre et traiter les informations Il est responsable du main .




l' homéostasie f- équilibre du milieu interne) avec le système endo

LE SYSTEME NERVEUX CENTRAL ( SNC )

très
fragile
}
le snc comprend :
Zone qui
-
L'
encéphale ( cervelet cerveau et
, dispose de
tronc cérébrale )
-
La moelle épinière
4
moyens
de
défense

-
Des os protecteurs : cerveau → boîte crânienne
moelle épinière → canal rachid
-
le liquide céphalo rachidien cu ) :




densité de
liquide aqueux qui a une
proche
l' encéphale (
fait sorte en
qu' il ne s' pas )
effondrecontribue
.




protège contre les coupstraumatisme et
à nourrir le cerveau

.
La barrière hémato-encéphalique : barrière
physiologi
qui limite l' accès de certains présentsmatériaux
Elle est essentiellement constituée d' un ensem
( dont
astrocytes )

les et l' enveloppe
méninges ( entre
-
les tissus nerveux

osseuse ) constitués de 3

feuilles protecteurs et

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