Izindebe ziyingxenye yomzimba ebonakalayo emlonyeni wezilwane eziningi, kubandakanya nabantu. Izindebe zithambile, ziyagudluka, futhi zisebenza njengendawo yokudla ukudla nasekukhulumeni komsindo nenkulumo.Izindebe zomuntu ziyisitho sezinzwa ezithintekayo, futhi zingaba yindawo erogenous lapho zisetshenziselwa ukuqabula nakwezinye izenzo zokusondelana . Isikhumba sendebe, esinezingqimba zeselula ezintathu kuye kweziyisihlanu, sincane kakhulu uma siqhathaniswa nesikhumba sobuso esijwayelekile, esinezingqimba ezingafika kwezili-16.Ngombala wesikhumba okhanyayo, isikhumba sezindebe siqukethe ama- melanocyte ambalwa (amaseli akhiqiza i-melanin pigment, enikeza isikhumba umbala wawo).Ngenxa yalokhu, imithambo yegazi ivela ngesikhumba sezindebe, okuholela kumbala wabo obomvu obonakalayo.Ngombala wesikhumba omnyama lo mphumela awugqamile kangako, njengoba kulokhu isikhumba sezindebe siqukethe i-melanin eningi futhi ngenxa yalokho sibonakala simnyama ngokwengeziwe.Isikhumba sendebe sakha umngcele phakathi kwesikhumba sangaphandle sobuso, nolwelwesi lwangaphakathi lwamafinyila lwangaphakathi lomlomo. Isikhumba sezindebe asinaboya futhi asinazo izindlala zomjuluko.Ngakho-ke, ayinayo ungqimba olujwayelekile lokuvikela izithukuthuku namafutha omzimba agcina isikhumba sibushelelezi, sivimbele amagciwane futhi silawule ukufudumala.Ngenxa yalezi zizathu, izindebe zoma ngokushesha futhi zikhubazeke kalula. Udebe olungezansi lwakhiwa ngokuvelela okuyigunya, igatsha le- arch pharyngeal yokuqala.Udebe olungezansi lumboza umzimba wangaphakathi we-mandible .Yehliswa yi- depressor labii inferioris muscle futhi i- orbicularis oris iyilinganisela kancane .