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GAMETOGENESIS

GAMETOGENESIS. SPERMATOGENESIS OOGENESIS OVARIAN CYCLE. LEARNING OBJECTIVES. Process of spermatogenesis Structure of mature sperm Process of oogenesis Process of folliculogenesis Female sexual cycles – ovarian cycle and uterine cycle. Male Reproductive Organs.

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GAMETOGENESIS

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  1. GAMETOGENESIS SPERMATOGENESIS OOGENESIS OVARIAN CYCLE

  2. LEARNING OBJECTIVES • Process of spermatogenesis • Structure of mature sperm • Process of oogenesis • Process of folliculogenesis • Female sexual cycles – ovarian cycle and uterine cycle

  3. Male Reproductive Organs • Testicles/ testis – seminiferous tubules • Epididymis • Ductus deferens • Seminal vesicles • Ejaculatory ducts • Prostate • Male urethra - Penis

  4. Male reproductive system

  5. The reproductive system of the male Two major functions: • Production of sperm • To provide safe passage for spermatozoa

  6. SPERMATOGENESIS • Is the sequence of events by which spermatogonia are transformed into spermatozoa. • It begins at puberty. • Occurs in seminiferous tubules of testis.

  7. Seminiferous tubules

  8. PHASES OF SPERMATOGENESIS • Spermatogonial Phase (Mitosis) • Spermatocyte Phase/Spermatocytosis (Meiosis) • Spermatid Phase (Spermiogenesis)

  9. PHASE I-Spermatogonial Phase

  10. PHASE II-SPERMATOCYTOSIS Spermatids

  11. PHASE III-(SPERMIOGENESIS)

  12. SPERMIOGENESISThe series of changes resulting in the transformation of Spermatids into spermatozoa • Formation of acrosome • Condensation of nucleus • Formation of neck, middle piece & tail • Shedding of most of the cytoplasm

  13. Sertoli cells, Interstitial cells

  14. SPERMATOGENESIS

  15. MATURE SPERM

  16. FEMALE GENITAL ORGANS • OVARIES • FALLOPIAN TUBES/ SALPHINX • UTERUS • VAGINA • EXTERNAL GENITALS - VULVA & CLITORIS • MAMMARY GLANDS

  17. FEMALE GENITAL ORGANS

  18. FALLOPIAN TUBE

  19. Functions • Oogenesis • Transport of ovum • Transport of sperms • Transport of zygote • Growth and development of embryo • Lactation

  20. OVARY - INTERIOR

  21. OOGENESIS WITH FOLLICULOGENESIS

  22. GRAAFIAN FOLLICLE

  23. FEMALE SEXUAL CYCLES • OVARIAN CYCLE • UTERINE CYCLE • Birth – Puberty • Menarche – Menopause • Post menopause

  24. HORMONES

  25. Uterine/ menstrual cycle

  26. Endometrium of Uterus Proliferative phase: glands and blood vessels scattered throughout the functional zone with little or no branching. New glands form and endometrium thickens. Secretory phase: glands are enlarged and have branches. Preparing the endometrium for implantation If no implantation then endometrium breaks down and menstruation begins.

  27. Hormones and cycles

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