Ava Williams
Ko da a yanayin sanyi na sanyi, karnuka na iya taɓa ƙasa da tafin hannunsu ba tare da sun sha sanyi ba. Sun yi nasara godiya ga na'urar dumama, bayyana masu binciken Jafananci a cikin mujallar "Veterinary Dermatology". Yana aiki kamar tsarin musayar zafi: dumi, jini mai shigowa yana dumama jinin da ke dawowa a cikin tawul, kiyaye kare dumi da tawul ɗin koyaushe sanyi.
Tushen zafi a cikin tafin hannu
Yin amfani da microscope na lantarki, masu binciken sun gano cewa arteries da veins a cikin tafukan kare suna kusa da juna. Wannan yana ba da damar zafi daga jinin iskar oxygen a cikin arteries da ke fitowa daga zuciya don canjawa wuri cikin sauƙi zuwa jinin da ke cikin jijiyoyi wanda a baya ya hadu da yanayin sanyi. Jinin daga jijiya yana gudu baya ya ɗumama har zuwa zuciyar kare kuma daga nan zuwa cikin tsakiyar jini.
Ka'idar dabbar dolphin da agwagwa
Thomas Ruf daga Cibiyar Bincike kan Dabbobin Dabbobi da ke Vetmeduni Vienna ya ce: "Ba a taɓa sanin karen yana amfani da musanyar zafin rana ba." A cikin wasu dabbobi, duk da haka, an san abin da ya faru - alal misali a cikin dabbar dolphin, wanda ke amfani da shi a cikin fin, a cikin kare da hancin barewa, da kuma a cikin ƙafar duck. “In ba haka ba, agwagi za su narke idan sun daɗe a kan kankara. Ta haka ne suke kiyaye zafin ƙafarsu a matakin sifili.”
Dabbobin suna da wata dabara ta musamman don godiya don gaskiyar cewa nama bai lalace ba. “Hanyoyin sassan jikin da abin ya shafa suna canzawa dangane da yanayi. A cikin kaka, dabbobin suna adana ƙarin mono- da polyunsaturated fatty acids kamar mai kifi, wanda ke ba su damar daidaitawa yadda ya kamata, ”in ji Ruf. Dabbobin da ke shiga cikin bacci suna samun nasarar daidaita jikin duka bisa ga ka'ida iri ɗaya. A cikin kaka, alal misali, marmots suna kallon musamman ga tsire-tsire masu kitse marasa ƙarfi - kuma a cikin hunturu ba su da matsala wajen kwantar da hankali zuwa digiri biyu gaba ɗaya.
Wasu karnuka ba sa sanyi
Bisa ga ka'ida ɗaya kamar yadda kerkeci na kakanni, yanayin zafi na karnuka kuma yana raguwa zuwa sifili lokacin sanyi. Duk da haka, wannan bai shafi kowa ba irin kare. "Wasu karnuka ba su dace da dusar ƙanƙara da ƙanƙara ba saboda an haife su don wasu halaye," in ji shugaban binciken. A wannan yanayin, musamman lokacin hunturu don karnuka zasu iya taimakawa. Suna ba da ƙarin kariya kuma ba wai kawai suna ba da kariya daga sanyi ba, har ma daga gishirin hanya da grit.