Anal glands are sweat glands that contain a brown, malodorous liquid that is eliminated upon defecation. [10][21][22] Being sensitive to adrenaline, apocrine sweat glands are involved in emotional sweating in humans (induced by anxiety, stress, fear, sexual stimulation, and pain). Eccrine and apocrine naevi are rare malformations of the glandular component of an eccrine or apocrine gland.The glands within a sweat gland naevus are increased in size and number from birth. apocrine sweat gland. [12], The apocrine gland is made up of a glomerulus of secretory tubules and an excretory duct that opens into a hair follicle;[13] on occasion, an excretory duct opens to the skin surface next to the hair. Emotional stress causes the tubule wall to contract, expelling the fatty secretion to the skin, where local bacteria break it down into odorous fatty acids. See more. In… Emotional stress causes the tubule wall to contract, expelling the fatty secretion to the skin, where local bacteria break it down into odorous fatty acids. The ducts of apocrine sweat glands extend into the follicles of hairs so that the sweat produced by these glands exits the body along the surface of the hair shaft. Apocrine sweat glands are found in mainly in the axillary and pubic regions of the body. 汗腺(かんせん、sweat gland, sudoriferous, sudoriparous glands)は、皮膚にある汗を分泌する腺である。 汗腺には主に次の2種が存在する 。. An apocrine sweat gland (/ ˈ æ p ə k r ə n,-ˌ k r aɪ n,-ˌ k r iː n /; from Greek apo– "away" and krinein "to separate") is composed of a coiled secretory portion located at the junction of the dermis and subcutaneous fat, from which a straight portion inserts and secretes into the infundibular portion of the hair follicle. [14] The gland is large and spongy, located in the subcutaneous fat deep in the dermis,[9][15] and has a larger overall structure and lumen diameter than the eccrine sweat gland. Sweat gland naevus. An apocrine sweat gland (/ˈæpəkrən, -ˌkraɪn, -ˌkriːn/; from Greek apo– "away" and krinein "to separate")[5][6] is composed of a coiled secretory portion located at the junction of the dermis and subcutaneous fat, from which a straight portion inserts and secretes into the infundibular portion of the hair follicle. [20], Apocrine sweat glands were originally thought to use only apocrine secretion: vesicles pinch off from the secretory cells, then degrade in the secretory lumen, releasing their product. HS is a chronic, inflammatory disease affecting sweat glands known as apocrine glands. Their apocrine glands, like those in humans, produce an odorless, oily, opaque secretion[10] that gains its characteristic odor upon bacterial decomposition. エクリン腺 (Eccrine sweat glands) は全身にあり場所によって密集度が異なる。 ヒトにおいて主に体温を下げるために利用される 。 Apocrine gland anal sac adenocarcinomas (AGASACA) are malignant tumors of the anal glands. Apocrine sweat glands refer to a gland, especially a sweat gland that secretes a viscous fluid into a hair follicle whereas eccrine sweat glands refer to a type of simple sweat gland that is found in almost all regions of the skin. [25], Myoepithelial cells form a smooth muscle lining around the secretory cells; when the muscles contract, they squeeze the secretory ducts and push out the accumulated fluid into the hair follicle. However, in some cases, the condition may involve sweat glands of the breasts, scalp, or other areas. “But when sweat is broken down by bacteria on the skin, it can cause a foul odor.” Essentially, there are two different types of sweat glands on your skin: eccrine and apocrine. The Sweat Glands are responsible for producing what is known as Sweat or Perspiration which cools down the body and gets rid of any excess salt in the body. Know what is a sweat gland, its classification and functions and the benefits of sweating. [18] Men have more apocrine sweat glands than women in all axillary regions. [11] Eccrine glands on their paws increase friction and prevent them from slipping when fleeing from danger. [20], The "axillary organs", limited regions with equal numbers of apocrine and eccrine sweat glands, only exist in humans, gorillas, and chimpanzees. Apocrine sweat glands involve in the secretion of a chemical fluid known as pheromones that have the ability to attract opposite sex. [23] Unlike eccrine sweat glands, which secrete continuously, the apocrine glands secrete in periodic spurts. As an example, sweat gland and salivary glands. The characteristic odor of perspiration is produced by the action of bacteria on the material secreted by the apocrine sweat glands. Thus, this explains the difference between apocrine and eccrine sweat glands. [27] The sweat only attains its characteristic odor upon being degraded by bacteria, which releases volatile odor molecules. [29][30], There is currently no evidence that any sweat glands vary substantially by racial group, with most studies claiming to find variation being subject to methodological flaws. Exocrine gland is a gland that secretes chemical substances into ducts. [28] Skunks, on the other hand, use the glands to release a secretion that acts as a powerful defense mechanism. [23] More bacteria (especially corynebacteria) leads to stronger odor. [3] The rest of the body is covered by eccrine sweat glands. It appears on the skin surface mixed with sebum, as sebaceous glands open into the same hair follicle. The tubules are wrapped in myoepithelial cells, which are more developed than in their eccrine gland counterparts. Apocryphal definition, of doubtful authorship or authenticity. [9] The apocrine sweat is cloudy, viscous, initially odorless, and at a pH of 6–7.5. That leaves the third potential source of a human pheromone—the apocrine gland. [21], In a five-month-old human fetus, apocrine glands are distributed all over the body; after a few weeks, they exist in only restricted areas,[9] including the armpits and external genitalia. Sweat gland lesions generally have variable apocrine or eccrine differentiation. What your sweat is composed of depends on which gland the sweat is coming out of. [15], Non-primate mammals usually have apocrine sweat glands over most of their bodies. [9] In humans, the apocrine glands in this region are the most developed (with the most complex glomeruli). In addition, apocrine metaplasia is also unrelated to apocrine breast carcinoma, which does develop within the apocrine glands of the breast. It contains water, protein, carbohydrate waste material, and NaCl. [9] For most mammals, however, apocrine sweat glands secrete an oily (and eventually smelly) compound that acts as a pheromone,[20] territorial marker, and warning signal. [8] Modified apocrine glands include the ciliary glands in the eyelids; the ceruminous glands, which produce ear wax; and the mammary glands, which produce milk. …directly onto the skin surface; apocrine glands usually develop in association with hair follicles and open into them. [8] Horses use them as a thermoregulatory device, as they are regulated by adrenaline and more widely distributed on equines than in other groups. This is a common phenomenon that takes place in all mammals. [20][26] Sweat and sebum are mixed in the hair follicle and arrive mixed at the epidermal surface. 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