Regnual animal III

I. MOLUSTE

mediu: apa marilor, putine in ape dulci/terestre

alcatuire: corp nesegmentat si moale, bogat in glande (cap, masa viscerala, picior musculos); mantaua - acopera masa viscerala; intre ea si corp se afla cavitatea paleala in care se gaseste aparatul respirator; ea secreta cochilii/valve calcaroase; sist resp - branhial/pulmonar

Cls. GASTEROPODE

alcatuire: cap cu doua perechi de tentacul inegale (in vf celor mari se…