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Nov 3, 2023 · The secretory units of sweat glands are surrounded by contractile myoepithelial cells which act to help secrete the gland’s product. The contraction of these cells are either controlled by hormones or nerve action. Sweat glands open into the skin’s surface, or in the case of apocrine sweat glands, into hair follicles.
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The secretory cells of the eccrine gland are surrounded by myoepithelial cells which can contract to propel its secretions to the surface. Apocrine sweat glands (apocrine being a misnomer, they are truly a merocrine gland, not an apocrine gland) function in the same way, however, their ducts lead to hair follicles, not directly to the skin surface.
The ducts open out onto epidermal ridges at a sweat pore. They can be further classified as merocrine (eccrine) glands. They secrete a watery fluid which is hypotonic to plasma its evaporation is important for thermoregulation. Sweat contains water, sodium, potassium, chloride, urea ammonia and lactic acid.
Sep 29, 2020 · Epidermis. Outer stratified squamous epithelium composed of epidermal and intraepidermal adnexal (acrotrichial and acrosyringeal) keratinocytes. Main purpose is cornification. Keratinocytes are connected by desmosomes, adherens junctions, tight junctions and gap junctions. Basal layer. 10% are stem cells. Produces keratin 5.
Merocrine is the most common manner of secretion. The gland releases its product and no part of the gland is lost or damaged (compare holocrine and apocrine). The term eccrine is specifically used to designate merocrine secretions from sweat glands (eccrine sweat glands), although the term merocrine is often used interchangeably. Examples
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Sweat glands were first separated into kinds by the French histologist Louis-Antoine Ranvier, who separated them in 1887 regarding their type of secretion into holocrine glands (sebaceous glands) and the merocrine glands (sweat glands), the latter were then in 1917 divided into apocrine and eccrine sweat glands. In 1987, apoeccrine glands were ...
Apocrine sweat glands (apocrine being a misnomer, they are truly a merocrine gland, not an apocrine gland) function in the same way, however, their ducts empty into hair follicles, not directly to the skin surface. B. Apocrine glands. Duke slide 93 recto-anal junction, H&E
