Seminiferous Tubule: A coiled structure with a diameter of 150 m and a length of 80 cm is known as a seminiferous tubule. Seminiferous Tubules are located in the testicles, the two oval-shaped organs on either side of a male’s penis. There are around 800 seminiferous tubules in each testicle, and this is where meiosis and subsequent development of spermatozoa occurs.
In a mature adult male, each of these tubules creates thousands of sperm every second. The tubules are tightly looped throughout the testes, and are incredibly long: perhaps as much as a mile between the two testes! Their tissue is lined with Sertoli Cells, a specialized cell type that is responsible for creating new sperm. They do so by secreting a protein that increases the concentration of testosterone inside the seminiferous tubules.
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