Jenereta yolemetsa ya okosijeni imagwiritsa ntchito ukadaulo wapamwamba wolekanitsa ma cell. Pogwiritsa ntchito nembanemba yopangidwa bwino, imagwiritsa ntchito kusiyanasiyana kwachilengedwe kwa ma permeration pakati pa mamolekyu a mpweya osiyanasiyana. Kusiyanitsa kwamphamvu kolamulirika kumapangitsa kuti mamolekyu a okosijeni adutse bwino mu nembanemba, ndikupanga mpweya wokhala ndi okosijeni kumbali imodzi. Kachipangizo katsopano kameneka kamaika mpweya wochokera mumpweya wozungulira pogwiritsa ntchito njira zakuthupi.