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morphology of a snailclick to hear

morphology of a snail tentacle foot growth line head mouth eyestalk eye shell whorl apex

tentacle click to hear

Small muscular appendage, long and retractable, having a tactile role.

foot click to hear

Large elongated muscular organ forming the lower portion of the snail and containing the head; it allows the snail to crawl.

growth line click to hear

Thin irregular protuberance of the whorl of the shell, corresponding to its successive growths.

head click to hear

Anterior portion of the foot of the snail containing the main sensory organs.

mouth click to hear

Anterior cavity of the digestive tract having a jaw and a rough tongue (radula) to graze on plants.

eyestalk click to hear

Large muscular appendage, elongated and retractable, bearing an eye at its terminal end.

eye click to hear

Organ of vision located at the terminal end of the eyestalk; the snail has poor eyesight.

shell click to hear

Calcareous spiral casing formed of three successive layers that protect the organs; the snail can withdraw into its shell.

whorl click to hear

Each of the swirls around the apex; they increase in diameter and form the shell.

apex click to hear

Crown from which the shell grows.