Karnuka, mutane, da kifi suna numfashi saboda wannan dalili. Kowa na bukatar oxygen. Oxygen is a gas wanda jikin ke amfani dashi dan samarda kuzari.
Abubuwa masu rai suna fuskantar yanayi biyu na yunwa - ciki da oxygen. Ba kamar hutu tsakanin abinci ba, hutun da ke tsakanin numfashi ya fi guntu. Mutane suna ɗaukar numfashi 12 a cikin minti ɗaya.
Yana iya zama alama suna numfashi da oxygen kawai, amma akwai sauran gas da yawa a cikin iska. Lokacin da muke numfasawa, huhu yana cika da waɗannan gas. Huhu suna raba iskar oxygen daga iska kuma suna sakin wasu iskar gas da jikin ba suyi amfani da su ba.
Kowa yana fitar da iskar carbon dioxide, wanda jikin yake samarwa lokacin da yake samar da makamashi. Kamar yadda jiki yake zufa yayin motsa jiki, shima jikin yana fitar da iskar carbon dioxide lokacin da muke numfashi.
Kifayen ma suna buƙatar oxygen don motsa jikinsu, amma oxygen ɗin da suke amfani da shi yana cikin ruwa. Jikunansu ba irin na mutane bane. Mutane da karnuka suna da huhu, kuma kifi na da kwazazzabo.
Yaya gills ke aiki
Kwayoyin kifin suna bayyane yayin kallon kawunansu. Waɗannan su ne layukan da ke gefen kawunan kifin. Ana kuma samun kwazazzabon a cikin jikin kifin, amma ba za a iya ganinsu daga waje ba - kamar huhunmu. Ana iya ganin kifin yana numfashi a cikin ruwa saboda kansa yana girma yayin da yake ɗebowa a ruwa. Kamar dai lokacin da mutum ya hadiye babban abinci.
Da farko, ruwa yana shiga bakin kifin yana malala ta cikin kwazazzabon. Lokacin da ruwan ya bar kwazazzabon, sai ya koma cikin madatsar ruwa. Bugu da kari, sinadarin carbon dioxide da kifin ya samar shima ana cire shi tare da ruwan yayin da yake barin kwazazzabai.
Gaskiya mai dadi: kifi da sauran dabbobin da ke da gulma suna shaƙar oxygen saboda jininsu yana gudana ta cikin kwazazzabon cikin kishiyar hanya daga ruwa. Idan jini ya bi ta cikin kwazazzabai daidai da ruwa, kifin ba zai sami isashshen oxygen daga gare shi ba.
Kwazazzaban kamar matattara ne, kuma suna tara iskar oxygen daga ruwa, wanda kifin yake buƙatar numfashi. Bayan kwayayen sun sha iska (iskar oksijin), iskar gas din tana tafiya ta cikin jini kuma tana ciyar da jiki.
Wannan shine dalilin da ya sa yana da mahimmanci a bar kifi a cikin ruwa. In babu ruwa, ba za su sami iskar oxygen da suke buƙata ba don lafiya.
Sauran hanyoyin numfashi a cikin kifi
Yawancin kifi suna numfasawa ta cikin fatarsu, musamman lokacin da aka haife su, saboda suna da kankanta har ba su da wasu gabobin musamman. Yayinda yake girma, gill yana haɓaka saboda babu isasshen yaduwa ta cikin fata. 20% ko fiye musayar gas mai cutane ana lura dashi a wasu manya kifayen.
Wasu nau'in kifayen sun bunkasa ramuka a bayan kwazazzabon da ke cike da iska. A wasu kuma, hadaddun gabobi sun bunkasa daga sifar ban ruwa mai ban ruwa kuma suna aiki kamar huhu.
Wasu kifin suna shan iska ba tare da daidaitawa ta musamman ba. Eel na Amurka yana rufe 60% na buƙatar oxygen ta cikin fata kuma 40% yana haɗiye daga yanayin.
