Sweat glands

Sweat glands - a simple tubular glands of the skin that produce, concentrating secreting sweat. Have a look long tubules, starting up and opening onto the surface of the epidermis holes (sweat pores). The nature secretion (see Gland) sweat glands are divided into apocrine (large localized in the skin axillary hollows, pubis, scrotum, large private parts of the lips, around the anus) and merocrine (small present in the skin of the whole body). Sweat glands moisten the surface of the skin, participate in the thermoregulation (heat by evaporation of sweat) and release distinguish the products of protein metabolism and salt).
Cm. also Sweating and Hyperhidrosis.

Sweat glands - a simple tubular glands of the skin that produce sweat. The sweat glands are appendages of the skin and divide into eccrine (e-gland, actually P. W.) with merocrine and apocrine secretion (a gland), apocrine secretion (see Gland). The beginnings of the sweat glands in the form of small outgrowths of the epidermis appear on different parts of the skin at different time - between 3 and 5-th months of fetal life. Secretory process in e-glands begins after birth, and a-glands - in puberty. Man has the most P. W. refers to e-glands. Almost all a-glands are concentrated in the area of genitals, nipples, underarm (axillary), around the anus (circumanal), at the edge of the century (Moldovan), in ear canal (sulfuric, or ceruminosis), in anticipation of the nasal cavity. The sweat glands are involved in thermoregulation (heat by evaporation of sweat), release distinguish the products of protein metabolism and salt) and moisten the skin surface. Most a-glands - gland individual sexual odor, other secret possesses bactericidal properties. P. W. consist of excretory duct opening on the skin surface (e-gland) or in the hair follicle (most a-glands), and curled into a ball secretory Department (Fig. 1). Excretory ducts can bifurcate (a-glands often, and e-glands rarely). In one hair follicle can be opened up to three ducts and glands. The glomeruli P. W. lying in the lower sections of the dermis or in the upper sections of the subcutaneous tissue. The total number of P. W. in humans, approximately 2 million the Number and value them in different parts of the body are different.
Secretory Department of sweat glands (Fig. 2) consists of one series secretory cells, rich in alkaline phosphatase, and myoepithelial cells, reduction which promotes the separation of the secret. It is enclosed in a thin connective case containing many neutral
polysaccharides and spiral argyrophylla and elastic fibers. Electron microscope connection between P. W. and connective tissue three-layer (the cell membrane, lucid interval, connective tissue membrane). Sweat glands well vascularity and are sympathetic innervation. In old age the number of P. W. decreases secretion Department shortened, there are cystopathy expansion.
Cm. also Sweating.

Fig. 1. Sweat glands of the skin of the finger (H): 1-duct; Mr clew; 3 - sweat-time; 4 - the epidermis (scheme).
Fig. 2. Secretory Department (adenomas) sweat glands (glands) in several slanting (the skin of the breast): 1 - granules and drops secret; 2 - grain pigment; 3 - myoepithelial cells; 4 - the fat cells.