By William Montagna, Giuseppe Prota, John A. Kenney Jr.
This ebook is the 1st to be aware of the constitution and serve as of black dermis. There are a few physiological and structural modifications among black and white pores and skin; a space of excessive curiosity is that of transformations in accordance with solar and different destructive brokers. An realizing of reaction to destructive brokers is relevant to the issues of stopping or forestalling the early results of getting older in dermis (a goal that's accountable for the present growth in dermatological research).This ebook presents a concise multi-disciplinary perception into the biology, body structure, and chemistry of Read more...
summary: This e-book is the 1st to be aware of the constitution and serve as of black pores and skin. There are a few physiological and structural changes among black and white pores and skin; a space of extreme curiosity is that of adjustments in keeping with sun and different harmful brokers. An figuring out of reaction to harmful brokers is crucial to the issues of stopping or forestalling the early results of getting older in epidermis (a objective that's chargeable for the present growth in dermatological research).This e-book presents a concise multi-disciplinary perception into the biology, body structure, and chemistry of
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Extra info for Black Skin. Structure and Function
The large, multinucleated giant cells in this conglomerate from the normal scalp of a young, black African woman formed by the fusion of the macrophages (M) clustered at the periphery. A 2-jitm-plastic section stained with H and Lee. 180X. Perivascular and periappendageal infiltration of facial skin is encoun tered as often in black skin as it is in white skin (cf. Lavker and Kligman, 1988). There appears to be as many mast cells in black skin as in white skin. As a rule, mast cell microvilli lie very near fibroblasts and melanophages.
50X. , 1972). In Fontana-M asson preparations, all of the layers in black or white skin epidermis, including the stratum granulosum, stratum lucidum, and stratum corneum, contain melanosomes. In Figures 2-9, 2-10, and 2-1 la, b, c, we compare the density and distribution of melanosomes in black and white facial skin. , 1989). Each keratinocyte in the epidermis of black skin contains large, single, membrane-bound, ovoid melanosomes (Fig. 2-6). The skin of light-skinned black subjects may also contain smaller mela nosomes, crowded in small aggregates, in addition to the single membranebound ones.
All black skin epidermis, like that of white skin, has a stratum lucidum (Figs. 2-3 and 2-4) composed of two or three layers of compact, tightly II. The Epidermis 25 FIGURE 2-1. Melanocytes (M) among the basal keratinocytes (K), some with many basal rootlets (B), in the facial epidermis of a very dark-skinned white man. Melanocytes in this specimen contain some melanin granules, but they mostly look like clear cells. A 2-^m-plastic section stained with H and Lee. 450X . FIGURE 2-2. Dendritic processes (arrows) of a melanocyte (M) between basal keratino cytes (K) in the epidermis of a very dark-skinned white man.
Black Skin. Structure and Function by William Montagna, Giuseppe Prota, John A. Kenney Jr.