Fatar jiki yana da uku yadudduka:
- da epidermis
- da derms
- da hypodermis (wanda aka sani da nama mai asali )
Abubuwan da aka fi sani (epidermis) shine muhimmin tsarin da zai haifar da sautin fata, yayin da dermis (Layer Layer) ya ƙunshi nau'in haɗin kai, gashin gashi, da gurasar gumi wanda zai taimaka wajen tabbatar da mutunci da zafin jiki na fata. Mafi tsabta hypodermis yana da kitsen mai da har ma da kayan haɗi.
A cikin epidermis, akwai manyan layuka guda hudu na sel (wanda ake kira keratinocytes) wanda ke samar da fata da kwakwalwarsa, da kuma takarda guda ɗaya da aka ba da launi da dabino. Keratinocytes a cikin epidermis sun fara rarraba a cikin kashin ƙasa, suna turawa da rigar sunadaran zuwa cikin babba. Yayin da kwayoyin ke motsawa mafi girma, suna sannu a hankali kuma sun mutu.
Stratum Basale
Aikin kashin na epidermis ana kiransa stratum basale. Wannan Layer yana ƙunshe da jere guda ɗaya na keratinocytes mai ɗakunan suna da ake kira basal sel. Wadannan kwayoyin suna rarrabawa kuma suna turawa kwayoyin da aka riga sun kafa zuwa fatar jiki. Yayin da kwayoyin halitta suka shiga cikin sigogi na sama, za su kwantar da su, su mutu, kuma za a zubar da su don samun dakin sababbin kwayoyin halitta.
Melanocytes , kwayoyin da suke samar da melanin (alamar da ke samar da fata da launi), ana samuwa a cikin wannan Layer.
Stratum Spinosum
Shirin spinosum ya ta'allaka ne kawai a kan mahimmin stratum basal kuma kawai kimanin biyar zuwa 10 nau'i ne. Sel ɗin da ke motsawa cikin ramin spinosum (wanda kuma aka sani da tantanin halitta na prickle ko ƙaddarar jiki) wanda yake kama da morph daga siffar columnar ta farko a cikin wani nau'in polygonal (wanda yake da dama).
Sel a cikin wannan Layer suna da alhakin yin keratin, furotin fibrous wanda yake ba fata, gashi, da kuma kusoshi da kwarewarsu da haɓakar ruwa.
Stratum Granulosum
Kwayoyin dake cikin stratum granulosum, ko kuma Layer granular, sun rasa hakinsu kuma suna bayyana kamar kwayoyin da aka yi wa layi wanda ke dauke da ƙwayoyin duhu na kayan kayan cytoplasmic. Akwai ayyuka mai yawa a cikin wannan layi kamar yadda sunadaran keratin da lipids suke aiki tare don ƙirƙirar yawancin kwayoyin da ke da alhakin karewar fata.
Stratum Lucidum
Layer lucidum Layer kawai yana cikin baƙar fata na dabino da ƙuƙwalwa. Babban aikinsa shi ne rage ragewar tsakanin stratum corneum da stratum granulosum. Sunan ya fito ne daga Latin don "launi mai tsabta," wanda ke nuna gaskiyar kwayoyin halitta.
Stratum Corneum
Kwayoyin da ke cikin stratum corneum Layer sune ake kira corneocytes (ko kwayoyin jaraba). Wadannan kwayoyin sun lazimta kuma suna dauke da matattu. Yawancin sunadarai keratin da aka hada, corneocytes suna samar da ƙarfin gine-ginen dabarar magunguna amma har da damar shayar ruwa. Suna aiki a matsayin kariya mai tasiri ga duk wani sinadarai wanda zai iya cutar da kwayoyin halitta wanda ke ƙarƙashin su.
A Kusa-Up na Stratum Corneum
Tsarin tsarin sulhu na jiki na iya zama mai sauƙi, amma yana taka muhimmiyar rawa wajen kiyaye daidaito tsarin da kuma tsaftace fata. ba kawai tabbatar da ci gaba da samar da sababbin fata ba amma yana bada jiki mai mahimmancin karewa daga ƙwayoyin cuta, kwayoyin cuta, kwayoyin cuta, da kowane irin nau'i na pathogen ko toxin.
> Source
- > Kolarsick P .; Kolarsick M .; da Goodwin, C. "Anatomy da Jiki na Skin." Journal of the Dermatology Nurses Association . 2011; 3 (4): 203-213.