Kudzera njira yopukutira, khungu limatha kukwaniritsa chotupa komanso chowoneka bwino. Munthawi ya njirayi, kumasulidwa kosalekeza kwa zinthu zakuya kuchokera pansi pakhungu kumapereka chakudya chochepa chonyowa. Zotsatira zake, khungu limatha kukhalabe ndi dziko lowala komanso lotanthauzira, kuyambiranso unyamata wake. Pambuyo mankhwalawo, mudzakhala ndiutoto wosalala komanso wosakhazikika wonga khungu kumakumbutsa khungu la mwana.
Mndandanda wa jakisoni wopanda singano umagwiritsa ntchito liwiro la dzuwa (mamita 450 / chachiwiri) kulowa pakhungu mwachangu, kupangitsa chithandizo chosagwira. Panthawiyi, palibe kulumikizana mwachindunji ndi khungu. Kudzera muukadaulo wapamwamba wa oxygen, zosagwira ntchito zimayambitsidwa, zomwe zimapangitsa kuti kuchuluka kwa ma cell, kukonza ma cell jale, kukonzanso mpweya, komanso kulowetsedwa kwa zosakaniza.
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------