Izingxenye zesikhumba

-Delile

• Ukubuka konke

Ukubuka konke

Umuntu omdala ovamile unamaphawundi angaba ngu-6 esikhumba amboze izinyawo eziyizikwele eziyi-18, okwenza isikhumba isitho esikhulu somzimba. Ake sibheke ukuthi isikhumba sihlanganiswa kanjani. Isikhumba sinezingqimba ezintathu. Isendlalelo esiphezulu yi-epidermis. Kuvikela ezinye izingqimba kusuka endaweni engaphandle. Inamaseli akha i-keratin, evimbela amanzi futhi iqinise isikhumba. I-epidermis nayo inamaseli ane-melanin, i-pigment emnyama enikeza isikhumba umbala wayo. Amanye amaseli akwi-epidermis asivumela ukuthi sizwe ukuthintwa futhi sinikeze amasosha omzimba ngokumelene nabahlaseli njengamagciwane namanye amagciwane.

Isendlalelo esingezansi yi-hypodermis. Iqukethe amaseli amafutha, noma izicubu ze-adipose, ezifaka umzimba futhi zisize ukugcina ukushisa.Phakathi kwe-epidermis ne-hypodermis kukhona i-dermis. Iqukethe amaseli anika isikhumba amandla, ukusekelwa, kanye nokuguquguquka.Njengoba sikhula, amaseli edermis alahlekelwa amandla nokuguquguquka kwawo, okwenza isikhumba silahlekelwe ukubukeka kwentsha.

I-dermis inama-receptors wezinzwa avumela umzimba ukuthi uthole ukukhuthazeka okuvela ngaphandle futhi uzwe ingcindezi, ubuhlungu, nokushisa.Inethiwekhi yemithambo yegazi inika isikhumba izakhi zomzimba, futhi isuse imikhiqizo kadoti.

Izindlala zeSebaceous zikhiqiza uwoyela ogcina isikhumba singomi. Uwoyela ovela kwizindlala ezibusayo naye uyasiza ukuthambisa izinwele nokubulala amagciwane ezimbotsheni zesikhumba.

Lezi zindlala zimboza wonke umzimba, ngaphandle kwezintende zezandla namathe ezinyawo.

• Izimo Zesikhumba