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Elijah Dave M. Cordova posted an update in the group
Histology Art – E (2022) 4 years, 2 months ago Epidermis: It consists mainly of a stratified squamous keratinized epithelium made of keratinocytes. There are three less abundant epidermal cell types: (1) pigment-producing melanocytes; (2) antigen-presenting Langerhans cells; and (3) tactile Merkel cells. The epidermis distinguishes between thick skin found on the palms and soles and thin skin found elsewhere in the body. “Thick” and “thin” refer to the thickness of epidermal layers, which varies from 75 to 150 μm for thin skin and from 400 to 1400 μm (1.4 mm) for thick skin. Thick skin consists of five layers, namely (from top to bottom), stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale.Dermis: It is the connective tissue layer supporting the epidermis and binding it to the subcutaneous tissue (hypodermis). Its thickness varies with the body region. Its maximum thickness is 4 mm on the back. There is always a basement membrane between the epidermis’ stratum basale and the dermis. Moreover, the dermis has two sublayers: (1) the thin papillary layer; and (2) the underlying reticular layer.
Sweat Glands: These are long epidermal invaginations embedded in the dermis. There are two types of sweat glands, eccrine and apocrine. Eccrine sweat glands are widely distributed in the skin and are most numerous on the foot soles. Apocrine sweat glands are largely confined to the skin of the axillary and perineal region.
Reference:
Mescher, A. (2018). Junqueira’s basic histology: text and atlas (15th ed.). Mcgraw Hill Education.
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