| 词条 | Ctenidium (mollusc) | |
| 释义 |
A ctenidium is a respiratory organ or gill which is found in many mollusks. This structure exists in bivalves, cephalopods, Polyplacophorans (chitons), and in aquatic gastropods such as freshwater snail and marine snails[1]. Some aquatic gastropods possess one ctenidium known as monopectinate and others have a pair of ctenidia known as bipectinate. A ctenidium is shaped like a comb or a feather, with a central part from which many filaments or plate-like structures protrude, lined up in a row. It hangs into the mantle cavity and increases the area available for gas exchange.[2] The word is Latinized but is derived from the Greek ktenidion which means "little comb", being a diminutive of the word kteis meaning comb. References1. ^Ruppert Invertebrate Zoology: A Functional Evolutionary Approach. {{Bivalve anatomy}}{{Cephalopod anatomy}}{{Gastropod anatomy}}2. ^Respiratory system The apple snail. Retrieved 2012-04-20. 4 : Bivalve anatomy|Cephalopod zootomy|Gastropod anatomy|Invertebrate respiratory system |
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