1. 81.
. (nerve net)
. (nerve
cord)
. (ventral)
(ganglion)
1.
2.
3.
4.

2. 82. polysaccharide
10
1.( C6H12O6)10 2.(C6H10O5)10
3. C60H120O60 4. C60H102O51
=C60H120O60
=H18O9
C60H102O51
(C6H10O5)n n
83.

3. . .
3
.
. 2
1. , 2. ,
3. , ,
4. , ,
cephlothorax,