Ch%2027%20Male%20Reproduction%20Lecture%20Presentation%20Fall%2c%202011-1

8b c spermatogenesis spermatogonium2n differentiation

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Unformatted text preview: walls of seminiferous tubules are in various stages of cell division These spermatogenic cells give rise to sperm in a series of events Mitosis of spermatogonia, forming spermatocytes Meiosis forms spermatids from spermatocytes Spermiogenesis – spermatids form sperm Mitosis of Spermatogonia Mitosis of Spermatogonia Spermatogonia – outermost cells in contact with the epithelial basal lamina Spermatogenesis begins at puberty as each mitotic division of spermatogonia results in type A or type B daughter cells Type A cells remain at the basement membrane and maintain the germ line (aka _____ cells) Type B cells move toward the lumen and become primary spermatocytes Spermatocytes to Spermatids Spermatocytes to Spermatids Primary spermatocytes undergo meiosis I, forming two haploid cells called secondary spermatocytes Secondary spermatocytes undergo meiosis II and their daughter cells are called spermatids Spermatids are small round cells seen close to the lumen of the tubule Figure 27....
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