Bulb of vestibule

Source: Wikipedia, the free encyclopedia.
Vestibular bulbs
superficial inguinal lymph nodes
Identifiers
Latinbulbus vestibuli, bulbus clitoridis
TA98A09.2.01.013
TA23560
FMA20199
Anatomical terminology]

In female anatomy, the vestibular bulbs, bulbs of the vestibule or clitoral bulbs are two elongated masses of

vaginal opening. They are united to each other in front by a narrow median band. Some research indicates that they do not surround the vaginal opening, and are more closely related to the clitoris than to the vestibule.[1] They constitute the root of the clitoris along with the crura
.

Structure

Research indicates that the vestibular bulbs are more closely related to the clitoris than to the vestibule because of the similarity of the trabecular and erectile tissue within the clitoris and bulbs, and the absence of trabecular tissue in other genital organs, with the erectile tissue's trabecular nature allowing engorgement and expansion during sexual arousal.[1] Ginger et al. state that although a number of texts report that they surround the vaginal opening, this does not appear to be the case and tunica albuginea does not envelop the erectile tissue of the bulb.[1]

The vestibular bulbs are homologous to the

glans clitoridis.[3][4][5]

Physiology

During the response to sexual arousal, the bulbs fill with blood, which then becomes trapped, causing erection. As the clitoral bulbs fill with blood, they tightly cuff the vaginal opening, causing the vulva to expand outward. This puts pressure on nearby structures that include the corpora cavernosa and crura, inducing pleasure.

The blood inside the bulb's erectile tissue is released to the circulatory system by the spasms of orgasm, but if orgasm does not occur, the blood will exit the bulbs over several hours.[6]

Additional images

  • The sub-areas of the clitoris—areas include clitoral glans, body, crura. The vestibular bulbs and corpora cavernosa are also shown.
    The sub-areas of the clitoris—areas include clitoral glans, body, crura. The vestibular bulbs and corpora cavernosa are also shown.
  • Clitoral bulbs under the labia and on both sides of the vaginal entrance
    Clitoral bulbs under the labia and on both sides of the vaginal entrance
  • Homology of the male and female bulbs
    Homology of the male and female bulbs

References

Public domain This article incorporates text in the public domain from page 1266 of the 20th edition of Gray's Anatomy (1918)

  1. ^
    ISBN 978-1-60761-915-4
    . Retrieved June 23, 2012.
  2. ISBN 978-1-60831-384-6
    . Retrieved September 29, 2023.
  3. ISBN 978-1-84214-263-9
    .
  4. ISBN 978-3-13170-151-0
    .
  5. ISBN 978-3-319-04894-9. Archived
    from the original on 6 September 2014. Retrieved 19 October 2020.
  6. ISBN 1-58322-473-4
    .

External links
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