Changes

[[Image:Chicken female dissection.jpg|thumb|right|150px|Dissection of the Female Avian Reproductive Tract- Courtesy of Andrew Crook, Copyright RVC 2008]]

[[Image:Chicken female dissection.jpg|thumb|right|150px|Dissection of the Female Avian Reproductive Tract- Courtesy of Andrew Crook, Copyright RVC 2008]]

The oviduct may be divided into the infundibulum, magnum, isthmus, uterus and vagina.  The oviduct not only conducts the fertilized ovum to the [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]], but adds substantial amounts of nutrients.  It also encloses the ovum within membranes and a shell, providing protection for the embryo.  It conveys spermatozoa to the ovum for immediate fertilization and stores them for future use.  One insemination is sufficient to fertilize the ova released during the following 10 days.

The oviduct may be divided into the infundibulum, magnum, isthmus, uterus and vagina.  The oviduct not only conducts the fertilized ovum to the [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]], but adds substantial amounts of nutrients.  It also encloses the ovum within membranes and a shell, providing protection for the embryo.  It conveys spermatozoa to the ovum for immediate fertilization and stores them for future use.  One insemination is sufficient to fertilize the ova released during the following 10 days.

* The right oviduct regresses in development under the influence of MIH.

* The right oviduct regresses in development under the influence of MIH.

* Muscular S-shaped tube through which the completed egg passes when it is expelled.

* Muscular S-shaped tube through which the completed egg passes when it is expelled.

* Vagina is separated from the Uterus by a '''vaginal sphincter''' which terminates at the [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]].

* Vagina is separated from the Uterus by a '''vaginal sphincter''' which terminates at the [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]].

* Ends at a slitlike opening in the lateral wall of the Urodeum.

* Ends at a slitlike opening in the lateral wall of the Urodeum.

* Smooth muscle more powerful than the rest of the oviduct.

* Smooth muscle more powerful than the rest of the oviduct.

[[Image:Avian Cloaca Diagram.jpg|thumb|right|150px|Avian Cloaca Diagram - Copyright RVC 2008]]

[[Image:Avian Cloaca Diagram.jpg|thumb|right|150px|Avian Cloaca Diagram - Copyright RVC 2008]]

* '''Urodeum''' is the middle compartment of the [[The_Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]].

* '''Urodeum''' is the middle compartment of the [[Avian_Vent_and_Cloaca_-_Anatomy_%26_Physiology#The_Cloaca|Cloaca]].

* Separated from other parts by circular mucosal folds.

* Separated from other parts by circular mucosal folds.

* Ureters and genital ducts empty into its dorsal wall.

* Ureters and genital ducts empty into its dorsal wall.