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Posted on: 04:28:12 PM on February 15, 2020
Posted By:
Debika Gogoi
Maturation of sperm


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Posted on: 04:06:00 PM on February 24, 2020
Spermatids (immature spherical spermatozoa) produced as a result of meiosis of spermatocytes become embedded in the sertoli cells and develops into mature spermatozoa. It includes the following steps. 1. Elongation or tail formation (a bunch of microtubules - axoneme of flagella forms) 2. Crowding of mitochondria at the base of tail or the middle piece to form the mitochondrial cloud for providing energy for locomotion 3. Removal of excess cytoplasm (called as residual body) by phagocytosis by sertoli cells. Only a tiny streak around the nucleus is left 4. Condensation of nucleus (head of sperm) 5. Golgi apparatus becomes the acrosome (sperm cap) above the nucleus After this sertoli cells release the mature spermatozoa into the lumen of seminiferous tubules by the process called spermiation. This process of sperm maturation in sertoli cells is called spermiogenesis (different from spermatogenesis which is the complete process of spermatozoa formation from the spermatogonia) Yet the final step of sperm maturation occurs in the female reproductive tract - capacitation





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