Mene ne epidermis? A tsarin da epidermis

The m jiki murfin yana da wani fairly hadaddun tsarin. A fata ne wani sashin jiki da kunshi biyu yadudduka. Shi aikin da dama da muhimmanci ayyuka: musayar, zafi management, tsoka mai amsa sigina, m. Mutane da yawa mamaki da abin da epidermis, amma sun manta a karo na biyu bangaren na fata - da dermis.

A tsarin da m rufe jiki

Skin kunshi biyu yadudduka - da epidermis kuma dermis. A babba epithelial Layer ne rabu da ƙananan wavy m. Its bayyanar ne ya sa ta gaban a kan surface na fata na musamman outgrowths - papillae. A babba Layer ne ta lebur-keratinized rabe epithelium. Ya ƙunshi wani jini, da kuma ikon da aka kawota a cikinta daga dermis kawai.

Bayan aikatã game da gaskiyar cewa irin wannan epidermis, gano inda ya ke, da yawa suna fara dauki wani amfani a tsarinta. Ya kunshi Kwayoyin, daban-daban a cikin tsari da kuma tsarin. Su yi tunani a wasu lokaci na rayuwarsu. Kauri daga cikin epidermis, dangane da wuri na iya zama daga 0,07 mm zuwa 1.4 mm. A thickest Layer ne a kan tafin kafa, dabino da hannuwansu. A sosai na bakin ciki fata (ta babba Layer) ne a cikin pubic yankin, a kan forearms, kunnuwa da kuma ciki.

A tsarin da babba cover keratinized

A epidermis kunshi biyar mutum yadudduka. Its main bangaren da aka kira wani keratinocyte. Amma tsarin da epidermis ne mafi rikitarwa fiye da shi zai ze farko duba. Masana sun gano irin wannan yadudduka:

• muhimmi (germinative).
• prickly.
• granular.
• m.
• jaraba.

Kowace daga cikinsu ya aikata wani takamaiman aikin da na da tsarin.

Yana da muhimmanci a san cewa fata Kwayoyin ne a cikin akai Jihar sabuntawa. A yadudduka gwada haifuwa matakai, handling, keratinization da desquamation. Dangane da musamman yanki na jiki na da cikakken epidermal karshe tsari na iya daukar 20 zuwa 30 days.

sashen dutsen corneum

The sama na epidermis aka hada da Kwayoyin cewa ne isasshe kusa lamba don juna. Located a cikin sashen dutsen corneum aka gyara su ne epidermal fata shamaki - su ne ya kira corneocytes. Wadannan fata Kwayoyin sun rasa da kwayoyin halitta da kuma suna cike da keratin.

Saboda wannan wadannan jaraba Layer aka gyara na iya kare su a karkashin nama daga inji lalacewa, da yawan zafin jiki bambancin, bushewa da kuma shigar azzakari cikin farji daga kwayoyin cuta. Jaraba Sikeli ya kasu kashi biyu iri daban-daban. Suna iya zama sako-sako da ko mai yawa cika keratin fibrils. A na biyu surface ne daga gare su. A farko located kusa da granular Layer. A cikin tsarin, za a iya samu ragowar baya located a cikinta kwayoyin halitta. Wadannan ma'aunan sukan kira T-Kwayoyin.

Wannan babba Layer na epidermis ne cutaneous shãmaki kuma kunshi dama yadudduka riga matattu Kwayoyin, wanda ake impregnated da lipids. Ba zato ba tsammani, wadannan abubuwa ne na asali matsaranta danshi a cikin fata.

m Layer

Wannan bangare na epidermis ba ko da yaushe bayyana. Haka kuma an kira eleidinovym Layer. Idan ba a gano, to, shi kama wani bakin ciki, haske, haske da kuma kama tsiri. Layer aka kira kawai saboda su bayyanar. Its sashi ne sinadaran kira eleidin. Yana da wani samfurin-akai domin kara keratinization Kwayoyin. Gano da shi, yawanci kawai a cikin fata daga dabĩnai da soles. Ya ƙunshi wani nukiliya-free mĩƙe Kwayoyin.

granular Layer

Lalle ne waɗanda suka magance da cewa wannan epidermis, gano inda ya ke, da kuma tuna da kauri, fahimta cewa kowanne daga da aka gyara ne negligible. Saboda haka, particulate Layer hada da kawai 1-2 Kwayoyin layuka a annan yankunan, inda wani bakin ciki epidermis. Amma shi kuma iya kunshi 10 layuka na Kwayoyin a cikin wadanda wuraren fata ne mafi m. Bã su da lu'u-lu'u-dimbin yawa, elongated, elongated da kuma tam guga man da juna. Located a cikin wannan Layer Kwayoyin suka rasa ikon raba. A cytoplasm akwai iri biyu katsin: Lamellar da eleidin. Suna located haka da cewa tsawon axis of kowane lu'u-lu'u-dimbin yawa Kwayoyin matsawa layi daya GROOVES ko scallops.

spiny Kwayoyin

Ko da kuwa da wuri wuri na fata, ya ce Layer kunshi layuka 5-10. Samun a shi da Kwayoyin ne a cikin nau'i na polygons. An duba karkashin wani microscope, za ka iya ganin ba kawai epidermal yadudduka na fata, amma kuma ganin Kwayoyin kansu, kunkuntar tsiri na sarari tsakanin su da dabara matakai cewa haye shi. Godiya ga kasancewarsu Layer aka mai suna prickly.

Keratinocytes suna da alaka a wannan ɓangare na epidermal desmosomes. Bã su da wani wajen hadaddun tsarin: sun bayyana kamar yadda biyu faranti, da kuma tsakanin su suna damara tsakanin wani cathode 4 da 3-m electron-m Layer. Yana desmosomes tallafawa ciki sifar tantanin halitta, suna da karfi intercellular tabbacin fili. Su kuma zama a matsayin hawa wuri domin tonofilaments. Ya kamata a lura da cewa mutum epidermis aka shirya don haka da cewa babba rabo spinous Layer rage-rage yawan desmosomes.

sifar tantanin halitta reminiscent na gyara na muhimmi sashen. Amma a lokaci guda su ne daban-daban. Spiny Kwayoyin ciri wani gagarumin yawan desmosomes da kuma daure tonofilaments su thicker.

muhimmi Kwayoyin

Wannan Layer ne mafi m daga cikin fata surface. Amma shi offers da yiwuwar zuwa cikakken gane abin da epidermis. Ne na karshe Layer a kan muhimmi farantin, wanda ƙuntatãwa daga sauran kyallen takarda. A Kwayoyin cikinta shirya a guda jere. Layer wanda suka samar, ta kuma yi kira germinal. Ya ƙunshi dama iri Kwayoyin. Akwai keratinocytes, melanocytes, lymphocytes, basophils nama. Har ila yau kunshe a cikin Layer Greenstein da Merkel Kwayoyin.

Keratinocytes a cikin wannan Layer kama cylinders cewa tsaya tsaye. Sun rarrabe iri biyu: lebur kuma zubchastoy surface. A farko wadanda aka rarraba, saboda su cell canji yakan faru. A karshen hidima a matsayin madadin aiki. Amma sun fara raba a wani lalacewar da fata.

Cikakken gane da kuma fahimtar tsarin da tsarin da epidermis iya zama, idan ka san cewa tsarin da aka gyara basophilic Layer ne dan kadan daban-daban. Bugu da kari kuma wasu gabbansa da nuclei, wanda ayan da duk sauran Kwayoyin, su ne takamaiman tsarin - tonofilameny. Akwai kuma na musamman hada, da ake kira melanin granules.

Ya kamata mu ma ce cewa melanocytes - musamman Kwayoyin ne iya samar da melanin. Wannan abu kare da tareda žata effects na ultraviolet radiation. A muhimmi Layer ne na tsari na 10-25% na Kwayoyin. A bayyanar da suka yi kama da wani teku urchin kuma located tsakanin keratinocytes. A cewar ta dogon tsari, za su iya yi jigilarsu melanin cikin sel by phagocytosis.

Sanin duk wannan bayanai game da tsarin, halaye daga cikin manya Layer na fata, za ka iya tunanin abin da epidermis, hanyar shi ya dubi da kuma abin da ake bukata.