Indlela yokuphefumla yeminenga
Las IminengaNjengazo zonke izilwanyana ezanyisayo, zifuna ioksijini ukuze ziphefumle. Ngexesha lokuntywila, umnenga kufuneka ubambe umphefumlo wawo kwaye ulondoloze ioksijini yawo. Olu tshintshiselwano lwegesi lwenzeka kwimiphunga yeminenga, inkqubo efana neyabantu nezinye izilwanyana ezanyisayo zasemhlabeni, yaye sisiseko sendlela yazo yokuphefumla.
Ngokwahlukileyo koko usenokucinga, iminenga ayikwazi ukuphefumla ngemilomo yayo. Kunoko, basebenzisa umngxuma, owaziwa ngokuba yi-spiracle ephezu kwentloko. Xa umnenga ufika phezu kwamanzi, ukhupha umoya ngomngxuma wokuvuthela, ulandelwe kukuphefumla umoya okhawulezayo othunyelwa emiphungeni.
Isakhiwo sokuphefumula komnenga
Imiphunga ye-Whale, nangona ifana neyethu, iye yafumana uthotho lohlengahlengiso oluyimfuneko kubomi basemanzini. Ngokungafaniyo nemiphunga yomntu, eyanda kwaye ifinyela kancinci ngexesha lokuphefumla. imiphunga yomnenga Ziyakwazi ukwandisa kwaye zifinyeze ngokukhawuleza, zivumela ukuphefumla okusebenzayo kunye nokukhupha umoya.
Olunye uhlengahlengiso olubalulekileyo kukukwazi kweminenga ukucinezela imiphunga xa intywila. Oku kunokwenzeka ngenxa yokuba imiphunga yawo ayirhangqwanga yimbambo eyomeleleyo njengeyethu, yaye inokumelana nolu xinzelelo lunamandla ngaphandle kokwenzakala.
I-blowhole: indaleko eyodwa
I-whale's blowhole yimpumlo eguqukileyo eye yahamba yaya phezulu entloko kwizigidi zeminyaka ye-evolution. Lo mngxuma uvumela iminenga ukuba ikwazi ukuphefumla ngaphandle kokukhupha umzimba wayo wonke emanzini.
Ngaphezu koko, ukuziqhelanisa ne-blowhole kuye kwanika iminenga amandla okuyigcina ivaliwe xa intywila ukuze ithintele ukungena kwamanzi. Ivuleka kuphela xa umnenga uphezu komhlaba kwaye ufuna ukuphefumla, ngaloo ndlela uphepha ingozi yokufuthaniselwa.
Iminenga kunye nokuntywila nzulu
Iminenga idume ngokukwazi ukuntywila kubunzulu obumangalisayo. Oku kuphakamisa umbuzo wokuba balugcina njani unikezelo lwabo lwe-oksijini ngeli xesha lide, lokuntywila.
- Iminenga inamandla okugcina ioksijini eninzi kwi-myoglobin, iprotheni yezihlunu. Esi sikhundla siphezulu kakhulu Iminenga, ebavumela ukuba bagcine ioksijini yabo ixesha elide ngaphantsi kwamanzi.
- Olunye uhlengahlengiso kukutya okucothayo kweminenga ngexesha lokuntywila. Xa umnenga untywila, intliziyo yawo ibetha kancinane, yaye ekuphela kwezihlunu ezifumana igazi neoksijini eqhelekileyo zezo zifunekayo ukuze uqubhe. Ngale ndlela, bagcina ioksijini yabo kwimisebenzi ebalulekileyo yomzimba.
Ukuthanda ukwazi malunga nokuphefumla komnenga
Ezinye iintlobo zeminenga, njengeblue whale kunye ne-humpback whale, zinemingxuma ekhupha umoya ngesantya esifikelela kuma-300 km/h! Le yenye yezinto ezininzi ezibangel’ umdla ezibonisa indlela ezi zidalwa ziqhelene ngokumangalisayo ngayo ukuze ziphile phantsi kwamanzi.
Ubomi beminenga, ngendlela entsonkothileyo yokuphefumla, bubungqina bamandla endaleko nokuziqhelanisa. Ngaphandle kokuba zizilwanyana ezanyisayo njengathi, baye bafumana iindlela ezimangalisayo nezisebenzayo zokukhula kwindawo abahlala kuyo emanzini kwaye bahlala bezezona zidalwa zibangela umdla nezingaqondakaliyo kwiplanethi yethu.