![]() 1.Oviducal Funnel 2.Oviduct 3.Ovisac The frontal end of the oviduct forms a wide oviducal funnel. Each oviduct is a long narrow, highly coiled tube and is divided into three parts in accordance with its structure as well as its functions. The ovarian follicles project towards the lumen of ovary and then the ovary enlarges. Each of the ovarian follicles contain a developing egg. During the breeding season, the wall of the ovary becomes studded having a large number of ovarian follicles. Just like the smaller frogs, each ovary in the female frog is small flat and lobulated throughout the year except during the breeding season. Also the fertilization process is external. During this time, it causes the female to release her eggs and then the male frog releases a layer of sperm onto the eggs through his cloaca. When frogs mate, the male climbs on top of the female, this certain position is called amplexus and can last several days. The cloaca is a small, median chamber that allows fecal matter, urine and sperm to pass out into the exterior. The urogenital duct emerges from the kidneys and then opens into the cloaca. Once in the kidneys, the vasa efferentia open into the bidder's canal and communicate with the urogenital duct. There are around 10 – 12 vasa efferentia and once they arise from the testes, they travel through the mesorchium and enter the kidneys on their side. The male frog's testes are found in the upper part of the kidneys near a double fold of peritoneum called mesorchium.
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