Jerin fasali na zamanin d a zamani cartilaginous kifi. su siffofin

A wannan labarin ya zama dole domin lissafa abubuwan da tsoho ãyõyi a zamani cartilaginous kifi. Wadannan sun hada da stingrays da kifayen teku. Shi ne game da su, kuma za a kara tattauna.

Sharks kuma haskoki: wani janar Siffar

Kamar yadda muka gani a baya, wannan aji na kifi, kungiyar na girman kwanyar, fice wakilan wadda ne haskoki da kifayen teku. Da dama dozin jinsunan wannan aji ne saurã daga zamanin d kungiyoyin. Kamar yadda a baya tsammani saboda da rashin kwarangwal bai sa su a rukuni na prehistoric dabbobi. Amma ga mai yawan ãyõyin irin wannan mahada wanzu.

List of tsoho ãyõyi

Da fari dai, suna da irin wannan siffa kamar yadda babu wani iyo mafitsara. Abu na biyu, ba su da gill rufe kansu gills da m tsarin. All gill slits, bi da bi, ya buɗe fitar da wani zaman kanta bude. Duk wadannan da aka ambata su ne siffofin peculiar zuwa tsohon kifi. A wannan batun, suna da zama a cikin m motsi. Sistem sakulasan ne sistem ta yi aiki fiye da yadda ya kamata, da zuciya yana da jini mazugi siffar da kara habaka yadda ya dace da wurare dabam dabam. Amma da alama na shark ne mai iko murdede jiki, wanda taimaka wa tsotso jini a ko'ina cikin jiki, kamar yadda zuciyar sharks ba saba high lodi.

Wajibi ne a ci gaba da canja wurin mafi tsoho Ƙarin fasali a zamani cartilaginous kifi. Na uku, shi ne daga ilimin Halittar Jiki halitta na jiki rage gogayya da ruwa, haka ne kara da gudun motsi. Bugu da kari, watsi da m hana makala na m ga jiki na kifi da kuma wasu har kare su da wasu iri kwayoyin.

Huxu, cartilaginous kifi baki bude yana shirya transversely, cewa shi ne halayyar ga tsoho kifi, a gaban wanda yake da tushe na hancinsa (rostrum), guringuntsi aka kafa, a tsarin shi ne hankula, misali, sharks. Biyar, da jiki da aka rufe da Sikeli placoid.

Shida, ba cikakken juya domin lissafa abubuwan da tsoho ãyõyi a zamani cartilaginous kifi a cika, idan ba la'akari da peculiarity na haifuwa. Saboda wannan aka fi saba da yanayi na zama fiye da da, a ce, fitar kasusuwan jikinsu kifi, wanda emit babu kariya game kokarinsu na samun kariya domin kansu. A gagarumin ɓangare na caviar zauna unfertilized. Mai sharks da kuma haskoki jikin tayi ake dangantawa da mahaifiyar bayan wani "Yara Place", wanda yake shi ne kama da placental dabbobi masu shayarwa. Ko sa saka m harsashi manyan qwai, tsoma su a cikin yashi.

A ciki tsarin da kifi na aji

Bari mu magana game da ciki tsarin da kifi, wanda za a iya dangana ga aji na guringuntsi, na predator da haske wakilan wannan aji, kamar shark.

Muscle Shark tsarin kunshi myomer, ɓullo. Myomere - tsoka segments. Tsokoki aka richly kawota tare da jini, a matsayin shark motsi - shi ke rayuwa. Don Shark jini baya ga zuciya, kawai da matsa lamba da generated da zuciya, ba zai isa. Rashi na urinary fili da kuma koda ne mai alama na ciki tsarin wadannan wakilan (musamman a iyakacin duniya sharks). A gubobi an wanke tafi da jini da kuma excreted ta hanyar fata kawai a waje predator. Gill slits located a kan surface na jiki da kuma bude ga waje da kuma cikin makogwaro. Kamar yadda aka bayyana a sama: a shark ne babu iyo mafitsara, wannan shi ne gaskiya musamman ga sama da aka jera a zamanin d siffofin zamani sharks da kuma haskoki. Bugu da kari ga ta primary aiki, da hanta abubuwa a matsayin wani ɓangare na iyo mafitsara. Muhimmanci hanta girma. Har ila yau, wannan aiki partially dauki kan pancreas da kuma gallbladder.

ƙarshe

Saboda haka, mun bayyana da kuma jera tsoho ãyõyin zamani cartilaginous kifi suna alama fasali na tsarin da adaptations zuwa rayuwa a cikin wani yanayi mai kama da zamanin d kifi.