Isibane esingatshiyo simele udidi oluthile ngaphakathi kokukhanya okungaqhushumbayo.
Iqhele ukubizwa ngokuba sisibane sokumelana nokudubula kohlobo lomlilo, isebenzisa indawo ebiyelweyo engaqhushumbayo ukwahlula iintlantsi zombane zangaphakathi. Oku kwahlula kuthintela ngempumelelo iintlantsi ekusebenzisaneni nomoya, ngaloo ndlela kuthintelwa ukutsha okanye ugqabhuko-dubulo.