FROG OVARY PARTS HOW TO
SWF EMBROIDERY MACHINE POTENTIOMETER HOW TO
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The ovisac opens the posterior end in the dorsal wall of the cloaca through its individual apertures lying anteriorly to the openings of ureters. The coiled oviduct travels posteriorly along the outer side of the kidney while the hinder portion of the oviduct becomes very thin walled. It then becomes highly coiled and thick-walled. The oviducal funnel is located on the dorsal side of the lung and also leads into the oviduct. 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. The principal reproductive organs for the female frog are the ovaries. The principal reproductive organs for the male frog are a pair of testes.
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