This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Sperm attains motility in: \nSelect and explain. \nA. Vas deferens, B. Rete testis, C. Seminal vesicle, D. Epididymis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Although initially only slightly motile, spermatozoa obtains full motility in the epididymis Development of the spermSpermatogenesis is the process of spermatagonia (diploid) mature into spermatozoa (haploid).Spermioogenesis is a pa of spermatogenesis where round spermatids mature into the mature spermatozoa form.Spermatozoa acquire some motility only after passing through the epididymisThe secretions of the epididymis, seminal vesicle and the prostate have a stimulating effect on sperm motility, but the sperm becomes fully motile only after ejaculationContinuously throughout life occurs in the seminiferous tubules in the male gonad-testis.At pubey spermatagonia activate and proliferate (mitosis).About 48 days from entering meiosis until morphologically mature spermatozoaAbout 64 days to complete spermatogenesis, depending reproduction time of spermatogoniaFollicle stimulating hormone (FSH) - stimulates the spermatogenic epitheliumLuteinizing-hormone (LH) - stimulates testosterone production by Leydig cells Stages of spermatozoa developmentSpermatogonia - are the first cells of spermatogenesisPrimary spermatocytes - large, enter the prophase of the first meiotic divisionSecondary spermatocytes - small, complete the second meiotic divisionSpermatid - immature spermatozoaSpermatozoa - differentiated gamete', 'role': 'assistant'}]