The Bartholin's glands (named after
Caspar Bartholin the Younger
Caspar Bartholin the Younger (; Latinized: ''Caspar Bartholin Secundus''; 10 September 1655 – 11 June 1738), was a Danish anatomist who first described the "Bartholin's gland" in the 17th century. The discovery of the Bartholin's gland is s ...
; also called Bartholin glands or greater vestibular glands) are two pea-sized
compound alveolar glands[Manual of Obstetrics. (3rd ed.). Elsevier. pp. 1-16. .] located slightly posterior and to the left and right of the
opening of the vagina.
They secrete mucus to
lubricate the vagina.
[
They are homologous to ]bulbourethral gland
The bulbourethral glands or Cowper's glands (named for English anatomist William Cowper) are two small exocrine and accessory glands in the reproductive system of many male mammals. They are homologous to Bartholin's glands in females. The bul ...
s in males. However, while Bartholin's glands are located in the superficial perineal pouch
The superficial perineal pouch (also superficial perineal compartment/space/sac) is a compartment of the perineum.
Structure
The superficial perineal pouch is an open compartment, due to the fact that anteriorly, the space communicates freely wi ...
in females, bulbourethral glands are located in the deep perineal pouch
The deep perineal pouch (also deep perineal space) is the anatomic space enclosed in part by the perineum and located superior to the perineal membrane.
Structure
The deep perineal pouch is bordered inferiorly by the perineal membrane, also kno ...
in males. Their duct length is 1.5 to 2.0 cm and they open into navicular fossa. The ducts are paired and they open on the surface of the vulva
In mammals, the vulva (: vulvas or vulvae) comprises mostly external, visible structures of the female sex organ, genitalia leading into the interior of the female reproductive tract. For humans, it includes the mons pubis, labia majora, lab ...
.[
]
Structure
The embryological origin of the Bartholin's glands is derived from the urogenital sinus
The urogenital sinus is a body part of a human or other Placentalia, placental only present in the development of the urinary system, development of the urinary and development of the reproductive organs, reproductive organs. It is the ventral p ...
; therefore, the innervation and blood supply are via the pudendal nerve
The pudendal nerve is the main nerve of the perineum. It is a Mixed nerve, mixed (motor and sensory) nerve and also conveys Sympathetic nervous system, sympathetic Autonomic nervous system, autonomic fibers. It carries sensation from the exter ...
and external pudendal artery, respectively. The superficial inguinal lymph nodes
Inguinal lymph nodes are lymph nodes in the groin. They are situated in the femoral triangle of the inguinal region. They are subdivided into two groups: the superficial inguinal lymph nodes and deep inguinal lymph nodes.
Superficial inguinal l ...
and pelvic nodes provide lymphatic drainage.
These glands are pea-sized (0.5–1.0 cm) and are lined with columnar epithelium. The duct length is 1.5–2 cm and is lined with squamous epithelium
Epithelium or epithelial tissue is a thin, continuous, protective layer of cells with little extracellular matrix. An example is the epidermis, the outermost layer of the skin. Epithelial ( mesothelial) tissues line the outer surfaces of man ...
. These are located just beneath the fascia and their ducts drain into the vestibular mucosa. These mucoid alkaline secreting glands are arranged as lobules consisting of alveoli lined by cuboidal or columnar epithelium. Their efferent ducts are composed of transitional epithelium
Transitional epithelium is a type of stratified epithelium. Transitional epithelium is a type of tissue that changes shape in response to stretching (stretchable epithelium). The transitional epithelium usually appears cuboidal when relaxed and ...
, which merges into squamous epithelium as it enters the distal vagina. The more proximal portions of the ductal system are lined by transitional epithelium and may be lined by columnar epithelium before arborization into glandular secretory elements.
These glands lie on the perineal membrane
The perineal membrane is an anatomical term for a fibrous membrane in the perineum. The term "inferior fascia of urogenital diaphragm", used in older texts, is considered equivalent to the perineal membrane.
It is the superior border of the super ...
and beneath the bulbospongiosus muscle
The bulbospongiosus muscles (in older texts bulbocavernosus and, for female muscle, constrictor cunni) are a subgroup of the superficial muscles of the perineum. They have a slightly different origin, insertion and function in males and females. ...
at the tail end of the vestibular bulb
In female anatomy, the vestibular bulbs, bulbs of the vestibule or clitoral bulbs are two elongated masses of erectile tissue typically described as being situated on either side of the vaginal opening. They are united to each other in front by ...
deep to the posterior labia majora
In primates, and specifically in humans, the labia majora (: labium majus), also known as the outer lips or outer labia, are two prominent Anatomical terms of location, longitudinal skin folds that extend downward and backward from the mons pubis ...
. The intimate relation between the enormously vascular tissue of the vestibular bulb and the Bartholin's glands is responsible for the risk of hemorrhage
Bleeding, hemorrhage, haemorrhage or blood loss, is blood escaping from the circulatory system from damaged blood vessels. Bleeding can occur internally, or externally either through a natural opening such as the mouth, nose, ear, urethra, ...
associated with the removal of this latter structure.
The openings of the Bartholin's glands are located on the posterior margin of the introitus bilaterally in a groove between the hymen
The hymen is a thin piece of mucosal tissue that surrounds or partially covers the vaginal opening. A small percentage of females are born with hymens that are imperforate and completely obstruct the vaginal canal. It forms part of the vulva ...
and the labium minus at the 4:00 and 8:00 o'clock positions. The glands duct opening is seen on the posterolateral aspect of the vestibule 3 to 4 mm outside the hymen or hymenal caruncles lateral to the hymenal ring.
History
Bartholin's glands were first described in 1677 by the 17th-century Danish anatomist Caspar Bartholin the Younger
Caspar Bartholin the Younger (; Latinized: ''Caspar Bartholin Secundus''; 10 September 1655 – 11 June 1738), was a Danish anatomist who first described the "Bartholin's gland" in the 17th century. The discovery of the Bartholin's gland is s ...
(1655–1738).
Earlier he jointly discovered the glands in cows with Joseph Guichard Duverney (1648-1730), a French anatomist.
Some sources mistakenly ascribe their discovery to his grandfather, theologian and anatomist Caspar Bartholin the Elder (1585–1629).
Function
Bartholin's glands secrete mucus
Mucus (, ) is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both Serous fluid, serous and muc ...
to provide vaginal lubrication
Vaginal lubrication is a naturally produced fluid that lubricates the vagina. Vaginal lubrication production increases significantly during sexual arousal in anticipation of sexual intercourse. Vaginal dryness is the condition in which this lub ...
during sexual arousal
Sexual arousal (also known as sexual excitement) describes the Physiology, physiological and psychological responses in preparation for sexual intercourse or when exposed to Sexual stimulation, sexual stimuli. A number of physiological response ...
.[ The fluid may slightly moisten the labial opening of the vagina, serving to make contact with this sensitive area more comfortable.] Fluid from the Bartholin's glands is combined with other vaginal secretions as a "lubrication fluid" in the amount of about 6 grams per day, and contains high potassium
Potassium is a chemical element; it has Symbol (chemistry), symbol K (from Neo-Latin ) and atomic number19. It is a silvery white metal that is soft enough to easily cut with a knife. Potassium metal reacts rapidly with atmospheric oxygen to ...
and low sodium
Sodium is a chemical element; it has Symbol (chemistry), symbol Na (from Neo-Latin ) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 element, group 1 of the peri ...
concentrations relative to blood plasma
Blood plasma is a light Amber (color), amber-colored liquid component of blood in which blood cells are absent, but which contains Blood protein, proteins and other constituents of whole blood in Suspension (chemistry), suspension. It makes up ...
, with a slightly acidic pH of 4.7.
Clinical pathology
It is possible for the Bartholin's glands to become blocked and inflamed resulting in pain. This is known as bartholinitis or a Bartholin's cyst.[ A Bartholin's cyst in turn can become infected and form an ]abscess
An abscess is a collection of pus that has built up within the tissue of the body, usually caused by bacterial infection. Signs and symptoms of abscesses include redness, pain, warmth, and swelling. The swelling may feel fluid-filled when pre ...
. Adenocarcinoma
Adenocarcinoma (; plural adenocarcinomas or adenocarcinomata ; AC) is a type of cancerous tumor that can occur in several parts of the body. It is defined as neoplasia of epithelial tissue that has glandular origin, glandular characteristics, or ...
of the gland is rare and benign tumors and hyperplasia
Hyperplasia (from ancient Greek ὑπέρ ''huper'' 'over' + πλάσις ''plasis'' 'formation'), or hypergenesis, is an enlargement of an organ or tissue caused by an increase in the amount of Tissue (biology), organic tissue that results from ...
are even more rare. Bartholin gland carcinoma is a rare malignancy that occurs in 1% of vulvar cancers. This may be due to the presence of three different types of epithelial tissue. Inflammation of the Skene's glands and Bartholin glands may appear similar to cystocele.
Other animals
The major vestibular glands are found in many mammal
A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...
s such as cat
The cat (''Felis catus''), also referred to as the domestic cat or house cat, is a small domesticated carnivorous mammal. It is the only domesticated species of the family Felidae. Advances in archaeology and genetics have shown that the ...
s, cows, and some sheep
Sheep (: sheep) or domestic sheep (''Ovis aries'') are a domesticated, ruminant mammal typically kept as livestock. Although the term ''sheep'' can apply to other species in the genus '' Ovis'', in everyday usage it almost always refers to d ...
.
See also
* List of distinct cell types in the adult human body
The list of human cell types provides an enumeration and description of the various specialized cells found within the human body, highlighting their distinct functions, characteristics, and contributions to overall physiological processes. Cell ...
* List of related male and female reproductive organs
* Mesonephric duct
* Skene's gland
References
{{DEFAULTSORT:Bartholin's Gland
Glands
Exocrine system
Human female reproductive system
Mammal female reproductive system
Anatomy named for one who described it
Sex organs