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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 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.
The anatomy of a common air-breathing land snail: much of this anatomy does not apply to gastropods in other clades or groups. Snails are distinguished by an anatomical process known as torsion, where the visceral mass of the animal rotates 180° to one side during development, such that the anus is situated more or less above the head. This ...
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 ...
Living abalone in tank showing epipodium and tentacles, anterior end to the right. Abalone (/ ˈ æ b ə l oʊ n i / ⓘ or / ˌ æ b ə ˈ l oʊ n i /; via Spanish abulón, from Rumsen aulón) is a common name for any small to very large marine gastropod mollusc in the family Haliotidae, which once contained six genera but now contains only one genus, Haliotis. [1]
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 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 ...
Each polyp has eight tentacles, the study’s lead co-author Yuka Kushida told McClatchy News over email. Overall, the gnome sea pen has 328 tentacles. Several close-up photos show a diagram of ...