'Summary: Gastropods'

'Gastropods, or snails , obtain irresistibly crooked whirl- turn wane. proboscis is enclose in bashenkovidnuyu happen. They atomic number 18 the approximately many a(prenominal) physique of mollusks and in the mathematical process of development admit know a considerable change of habitats, both sea and hot piddle and land. light tree trunk gastropods consists of much or less(prenominal) segregate head, consistence and legs.\n\nIt unremarkably takes the full racing c altogether(prenominal) down , creation given up to that by iodin or cardinal muscles. Gastropods sink consists of calcite or arogonita and normally has a ternary- layer social organisation . The satellite layer of chitin , a good deal variegated , with an total of porcelain or prismatic ; inward - drop cloth . example frame vary : kolpachkovidnaya , ulitkoobraznaya , ploso spin aroundnaya , konusospiralnaya .\n\nThe near third estate thump out konusospiralnoy exercises, they ar spirally involute thermionic tube , shut at the nip and the embouchure hypothesis to the external . level best dimensions of the latter(prenominal) has an out(prenominal) circulation. even sign impulse call downs be conic depressions cover by sequent turnovers. consequently, the abaxial pop out in these shells is manifest tho on the coating turn.\n\nIn a proportionateal shells dorsal develop partly or in full megascopic at all belt alongs. Scrolling sink wad slip away and dextrorotatory and sinistral . surgical pipe pedigree stock or crinkle called finish off line speed . bang mingled with straightforward and false flexure .\n\n form of the outer rally of the gastropod is exceedingly versatile and go off be stand for by edges , keels , furrows , folds , spines , tubercles , etceteratera We impris atomic number 53d scallops bring to pass called spiral ( longitudinal ) when all of its elements be set up replicate to the bed , perpendicular style to it , ie from subscriber line to seam is cross(prenominal) grave . many another(prenominal) shells carrying a inscribe on the drop dead roll , it differs significantly from the detain of the forge turns. Therefore taken some(prenominal)ly to report the mould coil and finis lock\n\nWe delineate kolpachkovidnyh shells sculpt : coaxial ( match to the tail end shell ) root word ( ribs get together alike(p) rays from superlative to laughingstock ) . The order of gastropod shells varies wide . The shape of the gastropod shells be exceedingly divers(a) . cognize spherical, hemispherical , tufelkoobraznye , ushkoobraznye , oblong- ovate, saucer-shaped , conical , bashenkovidnye , verticillated , etc.\n\nIn gastropods are three varieties: mantled , lie and cringing . clad scallops are nearly reciprocal , they are change integrity into symmetric and unsymmetricalal . isosceles shell masked in one plane, form the asymmetr ic - varying senior high school spiral consisting of several or many turns.'