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Apr 24, 2023 · The skin appendages are epidermal and dermal-derived components of the skin that include hair, nails, sweat glands, and sebaceous glands. Each component has a unique structure, function, and histology. This article describes the unique characteristics of each of these components and provides insight into tissue preparation for microscopic evaluation and the clinical significance of these ...
- Hani Yousef, Julia H. Miao, Mandy Alhajj, Talel Badri
- 2023/04/24
- 2020
- Skin Appendages Function
- Hair
- Nail
- Sebaceous Glands
- Sweat Glands
Skin appendages are structures embedded within or projecting from the skin that perform various important functions. They play an important role in keeping our skin healthy and functioning properly. These include: 1. Hair: Hair helps to insulate the body, protects the scalp from sunlight, and provides sensory input. It also traps sweat and dirt, he...
Hairs are horny threads varying in length, thickness, color, and distribution according to the race, sex, and site of skin.
Nails are horny plates present on the dorsal surfaces of the terminal phalanges of fingers and toes, they consist of closely-packed hard keratin scales.
These are simple branched alveolar, holocrine glands that develop from the upper third of the hair follicle; therefore, they are usually present where the hair is present. They are most numerous over the head region and the anogenital area.
They are simple coiled tubular glands, they are found deep in the dermis or the hypodermis, there are two types of sweat glands; the eccrine and the apocrine glands.
Jul 31, 2023 · The skin contains several glands, hair, nails and nerve endings that allow it to function optimally. This article will discuss the embryology, gross anatomical and histological features of the appendages of the skin. Additionally, pathologies that affect the appendages and their consequences will also be discussed.
Skin Appendage Tumors. Most tumors of skin appendages (hair shafts, sweat glands, and apocrine glands) have characteristic morphologic features that mimic their cell of origin (e.g., hair shaft, eccrine gland). The vast majority of these tumors behave in a benign (or at most locally aggressive) fashion, and metastasis is exceptionally rare.
Aug 21, 2023 · mesoderm. , is the innermost layer of the skin and is mainly composed of fat and connective tissue. Skin appendages are derived from the skin and include hair, nails, and glands. The main functions of the skin are protection (barrier against ultraviolet radiation, microorganisms, and water loss), the synthesis of. vitamin D.
- Exocrine (holocrine) branched glands
Jan 1, 2015 · The skin appendages occupy approximately 0.1 % of the total skin surface, although this varies from region to region with, for example, the axillary, anogenital area and forehead having a larger than average concentration of hair follicles (Bronaugh and Maibach 1999). Hairs are formed from compacted plates of keratinocytes and reside in the hair follicles, which are invaginations in the epidermis.
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Jul 23, 2023 · Conclusion: The histology of skin appendages reveals their unique structures and functions in maintaining skin health and overall well-being. Understanding the histology of hair follicles, sebaceous glands, sweat glands, and nails provides insights into their roles in thermoregulation, protection, sensory perception, and aesthetics ...
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