Gastropods: qauv, tseem ceeb heev functions, tu tub tu kiv

Gastropod mollusks, los yog tus qwj pom tau hais tias ib tug es loj hauv chav kawm ntawv ntawm cov tsiaj, uas niaj hnub no muaj txog 100 txhiab hom. Yuav luag tag nrho cov qub neeg ntawm cov pab pawg neeg twb marine kab mob, uas nyob rau hauv lub chav kawm ntawm evolution tau tsiv mus rau lub terrestrial thiab dej tsis qab ntsev ciaj sia taus. Paub thiab shellfish parasites, tab sis tsis yog li ntawd ntau npaum li cas. Interestingly, ib co hom muaj tsiv ib tug thib ob lub sij hawm mus rau cov dej txoj kev ntawm lub neej, lawv pog koob yawg koob tau terrestrial kab mob.

Gastropods: lub tsev

Lub cev ntawm cov neeg sawv cev ntawm no hom yog muab faib mus rau hauv ib lub taub hau chaw ua hauj lwm, lub cev, npag ob txhais ceg. Nyob rau hauv lub taub hau ntawm ntau hom muaj ib tug los yog ob khub ntawm tentacles. Raws li rau lub cev, nws yog asymmetrical thiab yog kiag li nyob rau hauv lub dab ntxuav tes. Tog nyob rau hauv gastropod ib thiab ntaub ntawv ib tug kauv uas txawv tus naj npawb ntawm curls. Ceg ua hauj lwm pab kev tsiv thiab kho - muaj ib tug tshwj xeeb ib nyob rau hauv underside. Nyob rau hauv ib qho xwm ceev, lub taub hau thiab lub ceg nruj hauv lub plhaub.

Tuav txoj cai kab noj hniav ntawm cov tsiaj yog nyob rau hauv lub qis plhaub lem. Cov ducts qhib lub excretory system, raws li zoo raws li lub qhov quav. Ib txhia mej zeej ntawm lub chav kawm ntawv no yog cov tawm ducts ntawm lub tsev me nyuam system. Nws yog nthuav tias ib feem ntawm lub mantle ntawm lub marine lub neej tau hloov zuj zuj mus rau lub gills, thiab nyob rau hauv terrestrial inhabitants cia lub teeb.

Integument hais epithelium, uas yog nplua nuj nyob rau hauv ib qog uas tsim hnoos qeev.

Gastropods: internal qauv

Digestive system pib lub qhov ncauj kab noj hniav, cov lus qhib ntawm uas yog pov tseg nyob rau hauv lub underside ntawm lub taub hau cheeb tsam. Lub caj pas yog ib qho chaw hu ua radula, uas yog ib tug chitin grater uas khoom noj khoom haus yog crushed thiab nkag mus rau hauv txoj hlab nqos mov. Tom ntej no los lub plab (nyob ntawm no qhib hepatic ducts) thiab cov hnyuv, xaus lub qhov.

Lub excretory system nyob rau hauv feem ntau hom sawv cev ib lub raum, txawm hais tias muaj cov tsiaj, thiab nrog rau cov ob lub cev. Lub circulatory system yog hais txog lacunarity hom thiab muaj lub plawv thiab leeg tshav system khoob.

Ua pa system sawv cev gills los yog lub ntsws. Nyob rau hauv marine cov neeg sawv cev, raws li ib tug txoj cai, nws yuav pom ctenidium los yog thawj gills. Nyob rau hauv tib hom uas tau tsiv mus rau ib tug thib ob dej ciaj sia taus, ntses chaw dim pa nuj nqi yuav siv sij hawm lub mantle. Hauv pem teb cov neeg sawv cev yog yus muaj los ntawm ib tug ntau ua pa system, uas muaj ib tug khaub-ncaws nyias thiab tracheal hlab, uas diverges thiab yog cov huab cua rau tag nrho cov qhov chaw hauv lub cev.

Zoo tsim thiab lub paj hlwb, uas yog xa mus rau raws li diffuse-ntawm hom. Feem ntau cov tsiaj muaj tsib officers ntawm yooj yim ganglia. Nws yog ib nqi sau cia thiab zoo-tsim kev txiav txim zoo hauv nruab nrog cev, xws li lub qhov muag thiab tactile receptors.

Gastropods tej zaum yuav ib tug dioecious (marine hom) thiab hermaphrodites (av thiab dej tsis qab ntsev cov neeg sawv cev). Fertilization feem ntau tshwm sim nyob rau hauv lub cev ntawm tus poj niam, ces nws nteg nws cov qe ua. Nws yog nthuav tias nyob rau hauv ib lub sij hawm gastropod nteg ob peb lub qe ib zaug, txoj kev ua ib tug clutch.

Lub qe yog them nrog ib tug capsule nrog ib tug me me hau rau saum. Tej zaum rau sab nraum masonry siv hnoos qeev txuas infertile, empty tsiav tshuaj. Cov txheej txheem no muaj ib tug defensive ua cim - ib tug predator gnaws ib co empty qe, thiab ces yoojyim. Raws li rau txoj kev loj hlob, nws yuav ua tau tag nrho ob qho tib neeg thiab yuav tsim kab.

Gastropods: lub hom nrov tshaj plaws

Lub nto moo tshaj plaws tug tswv cuab ntawm cov chav kawm ntawv yog qhov thiaj li hu ua qwj. Nws yuav tsum tau muab sau tseg hais tias pawg loj ntawm cov tsiaj tej zaum yuav ua mob rau tus qoob loo ntawm cov txiv hmab. Nyob rau tib lub sij hawm, tshwj xeeb zus qwj nyob rau hauv tej lub teb chaws pom tau hais tias ua tau ib tug kim delicacy.

Thiab ib co housewives kos npe sib zog ntaus - ib tug me me mollusc nrog txo tog, uas pub tau mov rau cov nroj tsuag. Qhov no yog ib tug tiag tiag kab ntawm zaub cov qoob loo, li ntawd, yuav ua kom puas coob ntawm cov tshuaj siv.