waa maxay skin system?
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Maqaarku waa xubinta ugu weyn ee jidhka bini’aadamka, waana qayb ka mid ah nidaamka integumentary. Maqaarku wuxuu leeyahay dhowr hawlood oo muhiim ah, oo ay ku jiraan ka-hortagga waxyeellada jireed, kiimikaad, iyo bayooloji, nidaaminta heerkulka jidhka, dareenka, soo saarista qashinka, iyo isku-darka fitamiin D-ga.
Maqaarku wuxuu ka kooban yahay saddex lakab oo waaweyn:
Epidermis: epidermisku waa lakabka sare ee maqaarka wuxuuna ka kooban yahay dhowr lakab oo unugyo ah. Lakabka ugu dambeeya wuxuu ka kooban yahay unugyo maqaarka dhintay oo ay ku riixeen dusha sare ee lakabyada hoose. Sidoo kale epidermisku wuxuu ka kooban yahay unugyo loo yaqaanno melanocytes, kuwaas oo soo saara midabka melanin ee maqaarka siiya midabkiisa.
Dermis: Maqaarku waa lakabka dhexe ee maqaarka wuxuuna ka kooban yahay unugyo isku xiran, xididdada dhiigga, neerfaha, iyo dhismayaal kale. Maqaarku wuxuu ka kooban yahay timaha follicles, qanjidhada dhididka, qanjidhada sebaceous, iyo dareemayaasha qaboojiyaha ee taabashada, cadaadiska, xanuunka, iyo heerkulka.
Hypodermis (nudaha subcutaneous): Hypodermis waa lakabka ugu qoto dheer maqaarka wuxuuna ka kooban yahay unug adipose (dufan) iyo unug isku xiran. Waxay siisaa dahaarka iyo barkinta jidhka.
Maqaarku waxa kale oo uu ka kooban yahay noocyo kala duwan oo unugyo ah, sida unugyo difaaca oo ka caawiya inay iska difaacaan cudur-sidaha, iyo unugyo gaar ah sida unugyada Merkel iyo unugyada Langerhans.
Guud ahaan, maqaarku wuxuu door muhiim ah ka ciyaaraa ilaalinta homeostasis ee jirka isagoo ka ilaalinaya dhaawaca iyo caabuqa, nidaaminta heerkulka, iyo bixinta macluumaadka dareenka.