Exocrine gland

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Exocrine gland
Latinglandula exocrina
CodeTH H2.00.02.0.03014
 
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Exocrine gland
Latinglandula exocrina
CodeTH H2.00.02.0.03014

In the animal kingdom, the general term gland falls into two major categories with further subtypes falling under each of these.

An Exocrine gland is distinguished by the fact that it excretes its essential product by way of a duct to some environment external to itself, be it either inside the body or on a surface of the body.

Examples of exocrine glands include the sweat glands, salivary glands, mammary glands, and liver.

An Endocrine gland is its counterpart. It secretes its essential product without the use of a duct directly into the bloodstream or else by diffusion into its surrounding tissue (paracrine signaling) where it often affects only target cells near the release site.

Examples of endocrine glands include the adrenal glands, located atop the kidneys and responsible for the secretion of certain hormones such as adrenaline, cortisol and others. The testes, in males and ovaries in females are not only gonads, organs which generate male and female germ cells respectively, but are also endocrine glands in that they produce various androgens and estrogens together known as steroidal sex hormones.

Further classification of exocrine glands[edit]

By structure[edit]

Exocrine glands contain a glandular portion and a duct portion, the structures of which can be used to classify the gland.

By method of excretion[edit]

Exocrine glands are named apocrine glands, holocrine glands, or merocrine glands based on how their products are excreted.

By product excreted[edit]

List of exocrine glands[edit]

Name(s)LocationProductStructure
Apocrine sweat glandsskincoiled tubular
Bartholin's glands, Tiedmann's glands, vulvovaginal glandsvulva, vagina
Bauhin's glands, anterior lingual glandstongue, near tipnonserous or mixed
Brunner's glands,duodenummucouscompound tubular
Bulbourethral glands, Cowper's glands, Mery's glandspenis, basePre-ejaculate
Ciaccio's glands, accessory lacrimal glandseye
Cobelli's glandsesophagus, just above the cardia, in the mucosamucous
Ebner's glandstongueserous
Eccrine sweat glandsskincoiled tubular
Esophageal glandsesophagusmucousracemose
Exocrine pancreaspancreasseroustubulo-acinar
Fränkel's glandsvocal cords, below the edge
Gastric chief cell, Wasmann's glandsstomachserous
Glomus coccygeum, coccygeal gland, Luschka's gland or ganglionacoccyx, near the tip
Goblet cellsdigestive tract, respiratory tractmucoussimple unicellular
Henle's glandseyelids, in the conjuctivatubular
Krause's glandsconjunctiva, middle portionmucous
Lieberkuhn's glandsintestines, surface of mucous membranesimple tubular
Littré's glands, Morgagni's glandsspongy portion of the urethraracemose
Mammary glandbreastcompound tubulo-acinar
Meibomian glandeyelidssebaceous
Moll's glandseyelids
Montgomery's glandsmammary areolasebaceous
Naboth's glandscervix and os uterimucous
Olfactory glands, Bowman's glandsnose, olfactory region
Paneth cellssmall intestineserous
Gley's glands, Sandstroem's glands
Parotid glandmouthseroustubulo-alveolar
Peyer's patches (or glands)ileum, lymphatic glands
Prostatesurrounds the urethra just below the urinary bladder
Pyloric glandsstomachmucoussimple branched tubular
Sebaceous glandskinsebumacinar - branched
Skene's glands, Guérin's glandsvagina
Sublingual gland, Rivini's glandmouthmucus (primarily)tubulo-alveolar
Submandibular glandmouthmixed (M+S)tubulo-alveolar
Sudoriparous glands, Boerhaave's glandsskin
Sigmund's glandsepitrochlear lymph nodes
Suzanne's glandmouth, beneath the alveolingual groovemucous
Weber's glandstonguemucoustubular
Glands of Zeiseyelids, free edgessebaceous

See also[edit]

Additional images[edit]

External links[edit]