Oq planariya nerv sistemasining tuzilishini aniqlang.
- halqa shaklida nerv tolasi, nervlar
- 2 ta yirik nerv tolasi, nervlar
- nerv hujayralari tarqoq
- 2 ta nerv tuguni, nerv zanjiri
- ikkita nerv tuguni, ikkita nerv tolalari va nervlar
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