Download - Les encadrés
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UD “LES ÊTRES VIVANTS”“LES ENCADRÉS”
1er TRIMESTRE C.M.2
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L e s c e l lu le s r é a l is e n t le s f o n c t io n s d e n u t r i t io n , r e la t io n
e t r e p r o d u c t io n .
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L e s c e l lu le s s e c o m p o s e n t d e m e m b r a n e c e l lu la i r e ,
c y t o p la s m e , c o m p o s a n t s c e l lu la i r e s e t n o y a u . L e s
c e l lu le s v é g é t a le s o n t a u s s i u n e p a r o i c e l lu la i r e .
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L e s c e l lu le s s o n t t r è s p e t i t e s . L e s c e l lu le s
a n im a le s p r é s e n t e n t d e s f o r m e s v a r ié e s e t le s
c e l lu le s v é g é t a le s s o n t h a b i t u e l le m e n t
p o ly g o n a le s .
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L e s c e l lu le s d e s ê t r e s v iv a n t s p lu r ic e l lu la i r e s
s o n t o r g a n is é e s e t c o o r d o n n é e s p o u r q u e
l ’ ê t r e v iv a n t r é a l i s e t o u t e s s e s f o n c t io n s .
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L e s c e l lu le s d e s ê t r e s v iv a n t s s ’ o r g a n is e n t e n t i s s u s , o r g a n e s e t
a p p a r e i l o u s y s t è m e .C e l lu le s ----- t i s s u s ----- o r g a n e s
----- a p p a r e i l o u s y s t è m e
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L e s a p p a r e i l s o u s y s t è m e s d e s ê t r e s v iv a n t s s e
c h a r g e n t d e r é a l is e r le s f o n c t io n s v i t a le s .
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L e s a n im a u x s o n t p lu r ic e l lu la ir e s , i l s
s ’ a l im e n t e n t d ’ a u t r e s ê t r e s v iv a n t s e t la p lu p a r t d ’ e u x
p e u t s e d é p la c e r .
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L e s p la n t e s s o n t p lu r ic e l lu la i r e s , e l le s
f a b r iq u e n t le u r s p r o p r e s a l im e n t s e t e l le s n e s e
d é p la c e n t p a s .
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L e s c h a m p ig n o n s s ’ a l im e n t e n t d e r e s t e s d ’ ê t r e s v iv a n t s e t
n e s e d é p la c e n t p a s . I l s p e u v e n t ê t r e u n ic e l lu la ir e s o u
p lu r ic e l lu la ir e s .
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L e s p a r a m é c ie s e t le s b a c t é r ie s s o n t
m ic r o s c o p iq u e s e t p r e s q u e t o u s s o n t
u n ic e l lu la ir e s .