Difference between revisions of "Vagina and Vestibule - Anatomy & Physiology"
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| − | {{ | + | {{toplink |
| − | == Introduction == | + | |backcolour =EED2EE |
| + | |linkpage =Reproductive System - Anatomy & Physiology | ||
| + | |linktext =Reproductive System | ||
| + | |maplink = Reproductive System (Content Map) - Anatomy & Physiology | ||
| + | |pagetype =Anatomy | ||
| + | |sublink1=Reproductive System - Anatomy & Physiology#Female Reproductive Tract | ||
| + | |subtext1=FEMALE REPRODUCTIVE TRACT | ||
| + | }} | ||
| + | <br> | ||
| + | ==Introduction== | ||
| − | The vagina constitutes the part of the female | + | The vagina constitutes the cranial part of the female copulatory organ and the vestibule constitutes the caudal part. |
| − | + | =Anatomical Boundaries= | |
| − | + | == Vagina == | |
| − | * Extends from the external ostium of the | + | * Extends from the external ostium of the Uterus to the entrance of the Urethra. |
* Long and thin walled. | * Long and thin walled. | ||
* Located in the median position within the pelvic cavity. | * Located in the median position within the pelvic cavity. | ||
| − | * Located between the | + | * Located between the rectum dorsally and bladder ventrally. |
| − | * Mostly retroperitoneal, but the cranial parts are covered by | + | * Mostly retroperitoneal, but the cranial parts are covered by peritoneum. |
| − | === | + | === Cow & Mare === |
| − | * Protruding | + | * Protruding cervix restricts the lumen of the cranial vagina to a ring-like space known as the fornix. |
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| − | + | == Vestibule == | |
* Extends from the external urethral opening to the external vulva, so combines urinary and reproductive functions. | * Extends from the external urethral opening to the external vulva, so combines urinary and reproductive functions. | ||
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* Lies mostly behind the ischial arch, sloping ventrally to its opening at the vulva. | * Lies mostly behind the ischial arch, sloping ventrally to its opening at the vulva. | ||
* The wall contains vestibular glands. | * The wall contains vestibular glands. | ||
| − | ** Secretions from these glands keeps the mucosa of the vestibule moist and facilitates | + | ** Secretions from these glands keeps the mucosa of the vestibule moist and facilitates coitus and parturition. |
| − | ** At | + | ** At oestrus, the odour of these secretions sexually stimulates the male. |
| − | == | + | ==Histology and Innervation== |
| − | + | == Vagina == | |
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| − | == | + | == Vestibule == |
| − | * | + | * Vestibular glands are small in the bitch, but numerous. Duct openings are arranged in a linear series. |
| − | + | * Some minor vestibular glands are also present in the pig, sheep, cow and mare. | |
| − | + | * In the cow and Ewe, a large glandular mass is present on each side of the vestibule. This drains via a single duct. | |
| − | + | * Dark patches on the vestibular walls mark the position of vestibular bulbs. | |
| − | + | ** Vestibular bulbs are a concentration of veins forming erectile tissue, this is the female homologue of the bulb of the penis. | |
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| − | ** Vestibular | ||
| − | == | + | ==Links== |
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Revision as of 08:02, 9 September 2008
|
Introduction
The vagina constitutes the cranial part of the female copulatory organ and the vestibule constitutes the caudal part.
Anatomical Boundaries
Vagina
- Extends from the external ostium of the Uterus to the entrance of the Urethra.
- Long and thin walled.
- Located in the median position within the pelvic cavity.
- Located between the rectum dorsally and bladder ventrally.
- Mostly retroperitoneal, but the cranial parts are covered by peritoneum.
Cow & Mare
- Protruding cervix restricts the lumen of the cranial vagina to a ring-like space known as the fornix.
Vestibule
- Extends from the external urethral opening to the external vulva, so combines urinary and reproductive functions.
- Shorter than the vagina.
- Lies mostly behind the ischial arch, sloping ventrally to its opening at the vulva.
- The wall contains vestibular glands.
- Secretions from these glands keeps the mucosa of the vestibule moist and facilitates coitus and parturition.
- At oestrus, the odour of these secretions sexually stimulates the male.
Histology and Innervation
Vagina
Vestibule
- Vestibular glands are small in the bitch, but numerous. Duct openings are arranged in a linear series.
- Some minor vestibular glands are also present in the pig, sheep, cow and mare.
- In the cow and Ewe, a large glandular mass is present on each side of the vestibule. This drains via a single duct.
- Dark patches on the vestibular walls mark the position of vestibular bulbs.
- Vestibular bulbs are a concentration of veins forming erectile tissue, this is the female homologue of the bulb of the penis.