<s>[INST] context: 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 [/INST] question: Sperm attains motility in: | options: A: Vas deferens B: Rete testis C: Seminal vesicle D: Epididymis | answer: D </s>