Is the opening of the anus and excretory duct into the lung. Some water snails, however, possess a type of gill. They are renewing the air supply in the lung. Many water snails can be seen releasing bubbles
When the snailĭrops and raises its body wall air is forced in and out of the cavity muchĪs in the mammalian lung.
Snail anatomy free#
In marine forms the edges of the mantle are free but in lung-breathers theĮdges are attached to the body wall except for a small pore.
Carbon dioxide passes out into the cavity. The roof of theĬavity is very thin walled and well supplied with blood vessels into which Gills, however,Ĭan function only in water and land snails have no gills. In the marine gastropods this cavity contains the gills. Gland and some other organs and is spirally coiled. Its shell, the body shows three regions – head, foot,Īnd visceral hump. The common garden snail Helix is a typical snail although far from Slugs are closely related to snails, differing from them mainly in having no proper shell a trace of a shell is present under the mantle. The pulmonates do not have a horny plate to close the shell. Because of this snails,Īlong with slugs, are called pulmonates (from the Latin pulmo meaning Have gills and instead breathe with a type of lung. Apart from a few small groups, snails do not A snail is a shelled gastropod (Class Gastropoda), a type of mollusc (Phylum Mollusca), living
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