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Oviduct - Anatomy & Physiology (view source)
Revision as of 09:10, 10 September 2008
, 09:10, 10 September 2008no edit summary
* The sperm are only released from the isthmus mucosa by the action of paracrine signals from an ova travelling down the oviduct.
* The sperm are only released from the isthmus mucosa by the action of paracrine signals from an ova travelling down the oviduct.
** The formation of a Functional reservoir is a possible supporting mechanism of [[Fertilisation, Implantation and Early Embryonic Development -Fertilisation- Anatomy & Physiology|Block to polyspermy]], as only a few sperm are released from the isthmus mucosa at any one time. This results in only a few sperm being in the vicinity of the ova at a time and so in a position of fertilising the ova.
** The formation of a Functional reservoir is a possible supporting mechanism of [[Fertilisation, Implantation and Early Embryonic Development -Fertilisation- Anatomy & Physiology|Block to polyspermy]], as only a few sperm are released from the isthmus mucosa at any one time. This results in only a few sperm being in the vicinity of the ova at a time and so in a position of fertilising the ova.
* The oviducts open into the uterine horn through the uterine ostium.
* This marks the site of the uterotubal junction.
* This junction is gradual in ruminants and pigs, but abrupt in the horse and carnivores.
* In the horse and carnivores, the uterine ostium is located on top of a papilla, which forms a barrier against ascending infections.
==Function==
==Function==
*A connecting tube structure between the uterus and ovary where fertilisation occurs.
*A connecting tube structure between the uterus and ovary where fertilisation occurs.
*To provide regulation check points for unfertilised oocytes.
*To provide regulation check points for unfertilised oocytes.
*Thick muscularis layer divided into inner circular layer and outer longditudinal layer
*Thick muscularis layer divided into inner circular layer and outer longditudinal layer
*few mucosal folds
*few mucosal folds
==Vasculature==
==Vasculature==
*Tubal branch of the ovarian artery.
*Tubal branch of the ovarian artery.