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Lec 3: Male Reproductive Tract Anatomy

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Presentation on theme: "Lec 3: Male Reproductive Tract Anatomy"— Presentation transcript:

1 Lec 3: Male Reproductive Tract Anatomy
Animal/Dairy Science 434 Lec 3: Male Reproductive Tract Anatomy

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

3 Warehouse and Delivery
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 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 Reproductive Organs of the Bull
Testis

7 Bull Testis Tunica Vaginalis parietal visceral Tunica Albuginea

8 Bull Tract Thermosensor Radiator Protective sac Scrotum

9 Bull Tract Longitudinal Section Cross Section

10 Scrotal Cross Section testicular parenchyma mediastinum

11 Testis Testicular Parenchyma Mediastinum

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

13 Mediastinum Rete Testis Seminiferous Tubule The Testis

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

15 Structure of the Testis
Spermatic Cord Vas Deferens Caput Epididymis Vasectomy Vas Efferentia 6-12 tubules Corpus Epididymis Cauda Epididymis

16 Structure of the Testis
Spermatic Cord Vas Deferens Caput Epididymis Vasectomy Vas Efferentia 6-12 tubules Seminiferous Tubule Corpus Epididymis 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 ng T/ml

18 Testis Arterial Pulse

19 Parietal Tunica Vaginalis
Spermatic Chord Vas Deferens Cremaster Muscle Pampiniform Plexus Parietal Tunica Vaginalis

20 Bull Tract Tunica Dartos

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

22 Bull Tract Gubernaculum

23 Bull Tract Pelvic Genitalia

24 Pelvic Genitalia of the Bull
Pelvic Urethra Muscle

25

26 Bulb of the Penis

27 Reproductive Organs of the Bull
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 Gubernaculum

28 Cross Section of Bull Penis

29 Penis Cross Section Corpus Cavernosum Urethra Corpus Spongiosum

30 Arterial Supply

31 Glans Penis

32 Glans Penis


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