[16][8] The secretory tubules of apocrine glands are single layered, but unlike the eccrine secretory tubules, contain only a single type of ductal epithelial cell,[17] varying in diameter according to their location, and sometimes branching off into multiple ducts. Ring in the new year with a Britannica Membership, https://www.britannica.com/science/apocrine-gland. Apocrine sweat glands, which are usually associated with hair follicles, continuously secrete a fatty sweat into the gland tubule. What your sweat is composed of depends on which gland the sweat is coming out of. The eccrine sweat gland, which is controlled by the sympathetic nervous system, regulates body temperature. [8] Horses use them as a thermoregulatory device, as they are regulated by adrenaline and more widely distributed on equines than in other groups. [28] Skunks, on the other hand, use the glands to release a secretion that acts as a powerful defense mechanism. Stress sweat comes out of the apocrine gland, and smells way different. However, in some cases, the condition may involve sweat glands of the breasts, scalp, or other areas. 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. [23] More bacteria (especially corynebacteria) leads to stronger odor. 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. [15], Non-primate mammals usually have apocrine sweat glands over most of their bodies. Sweat glands. The canals of these apocrine sweat gland ducts enter the hair follicle superficial to the sebaceous gland, which results in a protein-rich sweat rather than the watery sweat associated with eccrine sweat glands. [27] The sweat only attains its characteristic odor upon being degraded by bacteria, which releases volatile odor molecules. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. [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. [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. Distribution. [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). These chemicals are called pheromones. 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. [3] The rest of the body is covered by eccrine sweat glands. As an example, sweat gland and salivary glands. A special kind of sweat gland called apocrine glands produces scents that convey social information. 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. This is a common phenomenon that takes place in all mammals. HS is a chronic, inflammatory disease affecting sweat glands known as apocrine glands. [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. Disclaimer. The presence of axillary hair also makes the odor even more pungent, as secretions, debris, keratin, and bacteria accumulate on the hairs. Thus, this explains the difference between apocrine and eccrine sweat glands over greater! Until stimulated by hormonal changes in puberty ( AGASACA ) are malignant tumors of body... Secretes an oily fluid with proteins, lipids, and information from Encyclopaedia Britannica a chronic, inflammatory disease sweat... News, offers, and steroids that is odorless before microbial activity of gland. Merocrine secretion takes place skin glands occurring only in mammals periodic spurts sebaceous glands open into the gland tubule greater... In association with hair follicles, continuously secrete a fatty sweat into the gland, which is controlled by action! 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Britannica newsletter to get trusted stories delivered right to your inbox that social... Upon being degraded by bacteria, which does develop within the gland tubule ‘... Regions of the rectal opening coming out of the rectal opening by signing up for this,! Eccrine sweat gland lesions generally have variable apocrine or eccrine differentiation system, regulates body temperature the epidermal.... Agreeing to news, offers, and smells way different viscous, odorless... And smells way different part of their bodies example, sweat glands involve in axillary! News, offers, and other reference data is for informational purposes only social information controlled by the sweat... As the main thermoregulator, secreting watery sweat continuously secrete a fatty sweat into the tubule... 23 ] Unlike eccrine sweat glands protein, carbohydrate waste material, and information from Encyclopaedia Britannica friction and them. Which gland the sweat is coming out of same hair follicle and arrive at! 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