Figure 41-9 The human male reproductive system pubic bone urinary bladder ureter rectum seminal vesicle prostate gland urethra penis vas deferens bulbourethral gland epididymis testis urethral opening scrotum 2

Table 41-1 The Human Male Reproductive Tract 3

Figure 41-10 The anatomy of the testes vas deferens epididymis uncoiled seminiferous tubule testis A section through the testis spermatogonia daughter cells sperm Sertoli cells interstitial cell Cross-section of a seminiferous tubule 4

Figure 41-11 Spermatogenesis occurs continuously starting at puberty spermatogonium primary spermatocyte secondary spermatocytes spermatids sperm Mitosis Meiosis I Meiosis II Differentiation 5

Figure 41-13 Hormonal control of spermatogenesis hypothalamus GnRH anterior pituitary LH FSH testes interstitial cells Sertoli cells testosterone spermatogenesis stimulates inhibits inhibin 6

Animation: The Male Reproductive System

Figure 41-14 The human female reproductive system myometrium uterus fimbria endometrium ovary uterine tube urinary bladder pubic bone cervix urethra vagina rectum clitoris anus labia 8

Table 41-2 The Human Female Reproductive Tract 9

Figure 41-16 Follicle development uterine tube Ruptured follicle Ovulated secondary oocyte (egg) Corpus luteum Degenerating corpus luteum Mature follicle with a secondary oocyte ovary ovulating egg Developing follicles ovary Undeveloped follicles, each containing a primary oocyte 10

produced monthly beginning at puberty produced after fertilization Figure 41-15 Oogenesis develops in the fetus produced monthly beginning at puberty produced after fertilization egg secondary oocyte (egg) polar body oogonium primary oocyte polar body polar body polar body Mitosis Meiosis I Meiosis II 11

Animation: The Female Reproductive System

Figure 41-18 The secondary oocyte and fertilization secondary oocyte (egg) corona radiata zona pellucida An ovulated secondary oocyte Sperm surrounding an oocyte 13

Figure 41-19 Sterilization The uterine tube is severed and its ends are sealed The vas deferens is severed and its ends are sealed ovary testis uterus scrotum Vasectomy Tubal ligation 14