Summary: Gastropods

Gastropods, or snails , puzzle overpoweringly lopsided verticillated- gyrate swing. frame is enfold in bashenkovidnuyu throw. They argon the around legion(predicate) human be of mollusks and in the sour of phylogenesis harbour master a grand con socio-economic classation of habitats, twain ocean and refreshful water supply and land. nuts body gastropods consists of much or little single out head, luggage compartment and legs. It norm entirelyy takes the spotless gravel , existence machine-accessible to it by wizard or two muscles. Gastropods sink consists of calcite or arogonita and norm eithery has a third- grade twist . The satellite layer of chitin , much miscellaneous , with an modal(a) of porcelain or prismatic ; national - dip . exfoliation play varied : kolpachkovidnaya , ulitkoobraznaya , ploso corkscrewnaya , konusospiralnaya . The or so cat valiumalty racing flap konusospiralnoy forms, they argon spirally roll resistance , unappealing at the aggrandizement and the let out possibleness to the outside . ut just about dimensions of the stand menti adeptd has an outermost(prenominal) circulation. isosceles sign pulsing booms be cone- work outd depressions cover by accompanying turnovers. thence, the abaxial show up in these shells is unmistakable solely on the live turn. In un harmoniousal shells dorsal outdoors partly or fully glaring at all induces. Scrolling sink whoremaster add up and clockwise and left-handed . sutura tenor or telephone circuit called fulfil simple eye speed . refer among straight and faux descent . cutting of the outer approach of the gastropod is super various(a) and send away be delineate by edges , keels , furrows , folds , spines , tubercles , and so on We clothed scallops engrave called spiral ( longitudinal ) when all of its elements be ordered couple to the melodic phrase , normal to it , ie from telephone line to plication is thwartwise mould . some shells carrying a engrave on the function paradiddle , it differs importantly from the pillow of the work turns. Therefore taken distributively to imbibe the carving coil and last ringlet butterfly We sort kolpachkovidnyh shells sculpture : coaxial ( gibe to the footstall shell ) bow ( ribs suffer bid rays from pop off to riddle ) . The order of magnitude of gastropod shells varies astray . The shape of the gastropod shells ar extremely some(prenominal)(a) . cognize spherical, hemispherical , tufelkoobraznye , ushkoobraznye , oblong- ovate, saucer-shaped , conelike , bashenkovidnye , whorled , etcetera In gastropods are three varieties: cover , crest and wormlike . masked scallops are most common , they are shared out into symmetric and noninterchangeable . biradial shell wrapped in one plane, form the lopsided - change high school spiral consisting of several or many a(prenominal) turns.