Male reproductive system (urinogenital) of Frog
Male reproductive system consists of two testis attached to kidneys, several tara efferentia and two urinogeniteal ducts. Copulatory organs are absent IN frog.
1. Testis: A pair of testis are present. Each testis is an elongated or ovoid, light-yellow body attached to the antero-ventral surface of each kidney by a double dole of peritoneum, called mesorchium. Never the anterior end of testis arise several branched finger like fat bodies which provide reserve food to nourish developing spermatozoa and during seprmatogenesis.
Histologically each testis is a compact mass of much boiled seminiferous tubules, the epithelial lining of which produces spermatozoa by spermatogenesis.between two seminiferous tubules,there lies ledig's cell ehich produce male sex hormone testosterone.
# A mature sperm is microscopic, elongated about 0.03 mm long structure. It consists of a small rounded anterior acrosome, a long cylindrical head containing nucleus, a short middle piece containing controls and mitochondria, and a much elongated posterior motile tail terminating in a flagellum.
2. Vasa efferentia:All the seminiferous tubules in a testis are connected to form 10 or 12 narrow tubes, the tara efferentia. They leave form the margin of testis run through mesorchium and enter the margin of kidney to open into the bidder's cannal. The bidder's canal is connected to the tues through collecting tubules of kidney. Thus vasa efferentia conduct nature spermatozoa from testis to the ureter of kidney.
3. Urinogenital duct: Ureter in make frog is both a urinary duct and vas deferens, hence it is called urinogenital duct. The ducts of both the side open into roof of cloaca separately on urinogenital papillae. In some species of frog, the urinogenital ducts are enlarged near kidney or cloaca forming seminal vesicles for temporary storage of spermatozoa until needed.
Male reproductive system consists of two testis attached to kidneys, several tara efferentia and two urinogeniteal ducts. Copulatory organs are absent IN frog.
1. Testis: A pair of testis are present. Each testis is an elongated or ovoid, light-yellow body attached to the antero-ventral surface of each kidney by a double dole of peritoneum, called mesorchium. Never the anterior end of testis arise several branched finger like fat bodies which provide reserve food to nourish developing spermatozoa and during seprmatogenesis.
Histologically each testis is a compact mass of much boiled seminiferous tubules, the epithelial lining of which produces spermatozoa by spermatogenesis.between two seminiferous tubules,there lies ledig's cell ehich produce male sex hormone testosterone.
fig- a pair of testis
T.s of testis
# A mature sperm is microscopic, elongated about 0.03 mm long structure. It consists of a small rounded anterior acrosome, a long cylindrical head containing nucleus, a short middle piece containing controls and mitochondria, and a much elongated posterior motile tail terminating in a flagellum.
2. Vasa efferentia:All the seminiferous tubules in a testis are connected to form 10 or 12 narrow tubes, the tara efferentia. They leave form the margin of testis run through mesorchium and enter the margin of kidney to open into the bidder's cannal. The bidder's canal is connected to the tues through collecting tubules of kidney. Thus vasa efferentia conduct nature spermatozoa from testis to the ureter of kidney.
3. Urinogenital duct: Ureter in make frog is both a urinary duct and vas deferens, hence it is called urinogenital duct. The ducts of both the side open into roof of cloaca separately on urinogenital papillae. In some species of frog, the urinogenital ducts are enlarged near kidney or cloaca forming seminal vesicles for temporary storage of spermatozoa until needed.
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