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Animal/Dairy Science 434

Animal/Dairy Science 434. Male Reproductive Tract Anatomy. Learning Objectives. To be able to describe the male reproductive system in the bull. Structure Function. Testis. Epididymis. Factory 1-25 X 10 9 sperm/day “Plant” must be air conditioned. Finishing School Fluid Absorption

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Animal/Dairy Science 434

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  1. Animal/Dairy Science 434 Male Reproductive Tract Anatomy

  2. Learning Objectives • To be able to describe the male reproductive system in the bull. • Structure • Function

  3. Testis Epididymis • Factory • 1-25 X 109 sperm/day • “Plant” must be air conditioned • Finishing School • Fluid Absorption • 8-25 X 109 sperm • membrane changes • nuclear & flagellar stabilization • motility, fertility • cytoplasmic droplet translocation Penis • Delivery System • Erection • Protrusion • Ejaculation Tail of Epididymis • Warehouse and Delivery • Storage 10-50 X 109 sperm • Sperm for 5-10 ejaculates • Smooth muscle contractions upon sexual stimulation Accessory Sex Glands • Alterations & Packaging • Metabolic substrates • Surface coatings • Transport for sperm

  4. Bull Reproductive Tract

  5. Reproductive Organs of the Bull

  6. Testis Reproductive Organs of the Bull Primary Sex Organ

  7. Bull Testis

  8. Scrotum Bull Tract • Thermosensor • Radiator • Protective sac

  9. Bull Tract Longitudinal Section Cross Section

  10. Scrotal Cross Section

  11. Scrotal LongitudinalSection

  12. Seminiferous Tubule Tunica Albuginea Rete Testis (within the mediastinum) Structure of the Testis

  13. The Testis Mediastinum Rete Testis Seminiferous Tubule

  14. Structure of the Testis Seminiferous Tubule Tunica Albuginea Rete Testis (within the mediastinum)

  15. Spermatic Cord Vas Deferens Caput Epididymis Vas Efferentia 6-12 tubules Corpus Epididymis Cauda Epididymis Structure of the Testis Secondary Sex Organs • Vasectomy

  16. Spermatic Cord Vas Deferens Caput Epididymis Vas Efferentia 6-12 tubules Corpus Epididymis Structure of the Testis • Vasectomy Seminiferous Tubule Tunica Albuginea Rete Testis (within the mediastinum) Cauda Epididymis

  17. Spermatic Chord Pampiniform Plexus • Vascular, lymphatic and nerves • Heat exchanger • Houses cremaster muscle Testicular Artery • Pampiniform Plexus • Counter Current Exchange • 39°C - 34°C • 70 ng T/ml - 4.8 ng T/ml

  18. Testis Arterial Pulse Pampiniform Plexus Spermatic Artery Testicular Artery Testicular Artery

  19. Spermatic Chord Pampiniform Plexus

  20. Tunica Dartos Bull Tract

  21. Contraction of the Tunica Dartos Testis • Tunica Dartos • Smooth muscle • Androgen dependent(Testosterone)

  22. Gubernaculum Bull Tract

  23. Bull Tract Pelvic Genitalia

  24. Pelvic Genitalia of the Bull Pelvic Urethra Muscle

  25. Bull

  26. Bulb of the Penis

  27. Retractor Penis Muscle Sigmoid Flexure Reproductive Organs of the Bull Prostate Rectum Cowpers Gland Seminal Vesicles Ampulla Bladder Vas Deferens Glans Penis Caput Epididymis Scrotum Testis Cauda Epididymis Gubernaculum

  28. Cross Section of Bull Penis

  29. Penis Cross Section

  30. Glans Penis of the Bull Free Part of Penis Urethral Process Raphe Glans Penis Prepuce (Retracted)

  31. Glans Penis Urethral Process Raphe Glans Penis Free Part of Penis Prepuce (Retracted)

  32. Arterial Supply

  33. Prostate Reproductive Organs of the Bull Rectum Cowpers Gland Seminal Vesicles Ampulla Bladder Retractor Penis Muscle Vas Deferens Sigmoid Flexure Glans Penis Caput Epididymis Scrotum Testis Cauda Epididymis Prepuce Gubernaculum

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