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Chapter 26, part B

Chapter 26, part B. Reproduction and Development. Spermatogenesis: Sperm Production in the Testis. Seminiferous tubules Spermatids Spermatocytes Spermatozoa Sertoli cells Interstitial tissue Leydig cells Capillaries. Spermatogenesis: Sperm Production in the Testis.

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Chapter 26, part B

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  1. Chapter 26, part B Reproduction and Development

  2. Spermatogenesis: Sperm Production in the Testis • Seminiferous tubules • Spermatids • Spermatocytes • Spermatozoa • Sertoli cells • Interstitial tissue • Leydig cells • Capillaries

  3. Spermatogenesis: Sperm Production in the Testis Figure 26-9b-e: ANATOMY SUMMARY: Male Reproduction

  4. Spermatozoa Structure and Functions in Review • Head • Acrosome: • Nucleus: • Midpiece • Centrioles: • Mitochondria: • Tail: flagellum • Microtubules: Figure 26-10: Sperm structure

  5. Regulation of Spermatogenesis • GnRH  LH  Leydig cells  testosterone  20 sex charact. • GnRH  FSH  Sertoli cells  spermatoctye maturation • Inhibin feedback – FSH, testosterone – short & long loops

  6. Regulation of Spermatogenesis Figure 26-11: Hormonal control of spermatogenesis

  7. Female Reproductive Anatomy and Physiology: Overview • Ovary • Fallopian tube • Fimbriae • Uterus • Cervix • Endometrium • Vagina • Clitoris • Labia

  8. Female Reproductive Anatomy and Physiology: Overview Figure 26-12b: ANATOMY SUMMARY: Female Reproduction

  9. Ovary: Details of Histology & Physiology • Follicle • Oocytes • Thecal cells • Granulosa cells • Estrogen •  Corpus luteum • Corpus luteum • Progesterone • Inhibin

  10. Ovary: Details of Histology & Physiology Figure 26-12d: ANATOMY SUMMARY: Female Reproduction

  11. Menstrual Cycle: Egg Maturation, and Endometrial Growth • Follicular phase • Egg matures • Ovulation • Egg released • Luteal phase • Corpus luteum • Endometrium • Prep for blastocyst • No Pregnancy • Menses Figure 26-13: The menstrual cycle

  12. Endocrine Control of Menstrual Cycle: Follicular Phase • FSH stimulates follicular development • Estrogen: + feedback, limits more follicles

  13. Endocrine Control of Menstrual Cycle: Ovulation •  Estrogen  LH "surge" & FSH spike  egg release • Inhibin pushes FSH down ,  new follicle development

  14. Endocrine Control of Menstrual Cycle: Follicular Phase and Ovulation Figure 26-14a,b: Hormonal control of the menstrual cycle

  15. Endocrine Control of Menstrual Cycle: Luteal phase • Granulosa cells form corpus luteum  progesterone •  progesterone & estrogen maintain endometrium • Inhibin continues to limit new follicular development

  16. Endocrine Control of Menstrual Cycle: Late Luteal phase • Pregnancy: maintain  progesterone, estrogen & inhibin • No pregnancy:  progesterone, estrogen & inhibin • Menses,  FSH & LH  new follicle development

  17. Endocrine Control of Menstrual Cycle: Luteal phase and Late Luteal phase Figure 26-14c, d: Hormonal control of the menstrual cycle

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