Male Reproductive System

Question 1

Components

Answer 1

• testes (testicles)
• epididymis
• vas (ductus) deferens
• accessory glands: prostate, seminal vessicles, bulbourethral glands
• urethra and penis

Question 2

Testicle

Answer 2

Tunica albuguinea: dense fibrous capsule, limits swelling
Tunica vaginalis: extension of peritoneum
Parenchyma: meat of testicle
- seminiferous tubules
- interstitium
- septa (species)

Question 3

Seminiferous tubule

Answer 3

Spermatogenic cells
- sperm development
Sertoli (sustentacular) cells
- take care of developing sperm
Interstitial (Leydig) cells
- support secondary sex characteristics
- are NOT within the seminiferous tubules

Question 4

Epididymus

Answer 4

• head, body, tail (gross)
• pseudostratified epithelium and stereocilia
• smooth muscle
• into ductus deferens

Question 5

Vas deferens extends from the ____

Answer 5

Testicle to the urinary tract

Question 6

Ductus (vas) deferens

Answer 6

Longest portion
Part of "spermatic cord"
- artery and vein
- what gets cut during a vasectomy
- lots of smooth muscle

Question 7

Male accessory sex glands

Answer 7

• prostate: surrounds urethra
• seminal vessicles: cows/horses
• bulbourethral glands: where liquid component of semen is added
• function: storage, nuture, fluid

Question 8

Penis and urethra

Answer 8

Species variation

• fibrous: non-erectile, lots of fibrous CT, sigmoid flexure
• cavernous: blood filled sinuses, erectile

Question 9

Semen

Answer 9

Spermatocytes + fluid
- species variation
- volume, morphology
- seasonality
Slightly alkaline to balance out pH of vagina

Question 10

Elephants

Answer 10

Keep testicles intra-abdominally, females have ventral vagina