Search Results for: Pipe organs
bivalves are characterized by having a true coelom (body cavity) and organ systems for circulation, respiration, digestion, excretion, nerve conduction, and reproduction (towle ). bivalves have a reduced nervous system and an open circulatory system with heart, arteries, and veins that bathers the organs
in hemolympth. there are nephridia that remove wastes. as all parts lie within the mantle, cephalic sense organs are of no value, and thus, bivalves lack cephalic eyes and other cephalic sense organs. however, many have tentacles and/or photoreceptors, and even more sophisticated eyes with retina and...
https://www.newworldencyclopedia.org/entry/Bivalve