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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
Figure 5.1.1 – Layers of Skin: The skin is composed of two main layers: the epidermis, made of closely packed epithelial cells, and the dermis, made of dense, irregular connective tissue that houses blood vessels, hair follicles, sweat glands, and other structures. Beneath the dermis lies the hypodermis, which is composed mainly of loose ...
- Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Mat...
- 2019
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
- Epidermis
- Dermis
- Hypodermis
The epidermis is the most superficial layer of the skin, and is largely formed by layers of keratinocytes undergoing terminal maturation. This involves increased keratin production and migration toward the external surface, a process termed cornification. There are also several non-keratinocytecells that inhabit the epidermis: 1. Melanocytes – resp...
The dermis is immediately deep to the epidermis and is tightly connected to it through a highly-corrugated dermo-epidermal junction. The dermis has only two layers, which are less clearly defined than the layers of the epidermis. They are the superficial papillary layer, and the deeper reticular layer. The reticular layer is considerably thicker, a...
The hypodermis, or subcutaneous tissue, is immediately deep to the dermis. It is a major body store of adipose tissue, and as such can vary in size between individuals depending on the amount of fatty tissue present.
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Jul 31, 2023 · This article will describe the anatomy and histology of the skin. Undoubtedly, the skin is the largest organ in the human body; literally covering you from head to toe. The organ constitutes almost 8-20% of body mass and has a surface area of approximately 1.6 to 1.8 m2, in an adult. It is comprised of three major layers: epidermis, dermis and ...
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.
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Jun 8, 2024 · The skin is the largest organ in the body, covering its entire external surface. The skin has 3 layers—the epidermis, dermis, and hypodermis, which have different anatomical structures and functions (see Image. Cross Section, Layers of the Skin). The skin's structure comprises an intricate network that serves as the body's initial barrier against pathogens, ultraviolet (UV) light, chemicals ...
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