1 / 14

Male Reproductive System

Male Reproductive System. Biology 2122. Introduction. 1. Primary sex organ (gonads) are the testes 2. Testes produce sperm via ‘spermatogenesis’ Meiosis 3. Sex hormones (androgens) play vital roles in development and function of reproductive organs and sexual behavior

dusty
Télécharger la présentation

Male Reproductive System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Male Reproductive System Biology 2122

  2. Introduction 1. Primary sex organ (gonads) are the testes 2. Testes produce sperm via ‘spermatogenesis’ • Meiosis 3. Sex hormones (androgens) • play vital roles in development and function of reproductive organs and sexual behavior • Testosterone

  3. Reproductive Organs (sagittal view)

  4. Scrotum and Testes 1. Scrotum • Function • Structure • Dartos and Cremaster muscles 2. Testes • Function • Structure • Tuica vaginalis and albuginea • Semineferous tubules • Rete testes • Epididymis • Ductus Deferens

  5. Penis and Duct System 1. PenisStructure • Perineum; Glans Penis • Prepuce • Corpus spongiosum • Corpora cavernosa • Crura 2. Epididymis • P.S. epithelium • 20 days – sperm 3. DuctusDeferens • Ampulla – Ejaculatory duct • P.S. Epithelium 4. Urethra • Prostatic; membranous; spongy

  6. Seminiferous Tubules 1. Function • Produce Sperm • Spermatogenesis 2. Structure • Spermatogonia • Interstitial Cells 3. Spermatogenesis • Meiosis • Spermatocytes to Spermatids • Sperm • Sustentacular Cells • Sertolicells

  7. Meiosis and Mitosis

  8. Mitosis and Meiosis

  9. Spermatogenesis - Animation

  10. Development of Sperm Midpiece Head Flagella

  11. Prostate and Semen 1. Prostate • Secretion • Function 2. Semen • Contents • pH • Function • Prostaglandins • Relaxins • Amount

  12. Horomonal Regulation • (1). Hypothalamus, anterior pituitary and testes (brain-testicular axis) • (2). Four events that occur • (1). Release of GnRH • (2). GnRH stimulate release of FSH and LH • (3). FSH and spermotogenesis • Stimulates sertoli cells to release ABP • (4). LH binding to interstitial cells • Interstitial cell-stimulating hormone

  13. Hormonal Regulation • GnRH released • GnRH to pituitary cells • FSH and ABP • LH binding to interstitial cells • Testosterone levels rise • Testosterone enters the blood stream • Testosterone ‘feedback’ • Inhibin

  14. Secondary Sex Characteristics • (1). Induced in nonreproductive organs (testosterone) • (2). Characteristics • Pubic, facial and axillary hairs • Larynx enlarges • Skin thickens, oily • Skeletal muscles (density; size and mass) • BMR increased (increases sex drive)

More Related