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2 - olfactory epithelium 3 - corneal epithelium 4 - corneal endothelium 5 - retina 6 - layer with rod cells 7 - fibrous connective tissue layer 8 - nerve of the eye: Drawing of cross sections of the extracted tentacle (left) and constricted tentacle (right) with and eye of Helix pomatia. 1 - nerve of an eye 2 - 3 - 4 - eye 5 - tentacle ganglion ...
The upper pair of tentacles on the head of Helix pomatia have eye spots, but the main sensory organs of the snail are sensory receptors for olfaction, situated in the epithelium of the tentacles. Main articles: Sensory organs of gastropods and Nervous system of gastropods
Pulmonate land snails usually have two sets of tentacles on their head: the upper pair have an eye at the end; the lower pair are for olfaction. [1]In anatomy, an eyestalk (sometimes spelled eye stalk and also known as an ommatophore) is a protrusion that extends an eye away from the body, giving the eye a better field of view. [1]
Cornu aspersum (common garden snail) Stylommatophora is an order [3] of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This taxon includes most land snails and slugs. Stylommatophorans lack an operculum, but some close their shell apertures with temporary "operculum" made of calcified mucus.
The snail has a light grey or brown body, with its lower tentacles being long and almost touching the ground. The shell has usual dimensions of 76 mm long and 27.5 mm in diameter. [ 4 ] The shape of the shell tapers to a point at both ends ( fusiform ) with a narrow oval- to crescent-shaped opening and a shortened axis of the spiral shell near ...
Latiidae - small limpet-like snails confined to New Zealand. [9] One [5] or three species. Acroloxidae - about 40 species. [5] Lymnaeidae - found worldwide, but are most numerous in temperate and northern regions. [9] These are the dextral (right-handed) pond snails. About 100 species. Planorbidae - "rams horn" snails, with a worldwide ...
Glowing sea creature with 15 tentacles found off Florida coast. It’s a new species ‘Golden’-tailed creature — pregnant with 2 eggs — discovered as new species.
The snail extends the tentacles by internal pressure of body fluids, and retracts all four tentacles into the head by invagination when threatened or otherwise retreating into its shell. The mouth is located beneath the tentacles, and contains a chitinous radula with which the snail scrapes and manipulates food particles.