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Do Clams Have Siphons?

Alexander Ross • • 7 min read
Do Clams Have Siphons?

A siphon is an anatomical structure which is part of the body of aquatic molluscs in three classes: Gastropoda, Bivalvia

Bivalvia
Circulation and respiration

Bivalves have an open circulatory system that bathes the organs in hemolymph. The heart has three chambers: two auricles receiving blood from the gills, and a single ventricle. The ventricle is muscular and pumps hemolymph into the aorta, and then to the rest of the body.

› wiki › Bivalvia
and Cephalopoda
Cephalopoda
The smallest are only about 1 centimetre (6.2×10−6 mi) long and weigh less than 1 gram (0.035 oz) at maturity, while the largest—the giant and colossal squids—can exceed 10 metres (33 ft) in length and weigh close to half a tonne (1,100 lb), making them the largest living invertebrates.
› wiki › Cephalopod_size
(members of these classes include saltwater and freshwater snails, clams, octopus, squid and relatives). ... In those bivalves which have siphons, the siphons are paired.

Where is the siphon on a clam?

Locate two openings on the posterior end of the clam. The more ventral opening is the incurrent siphon that carries water into the clam and the more dorsal opening is the excurrent siphon where wastes & water leave.

Do all molluscs have siphons?

These siphons are used for respiration - to draw water into the mantle cavity and over the gill. Some air-breathing snails, however, use it like a snorkel to breathe while they remain underwater. Not all bivalves have siphons, but those that do have a pair of them - one for intake and one for excretion.

Alexander Ross
Author

Alexander Ross

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.