Male Reproductive System

Question 1

Boar reproductive

Answer 1

Produce sperm	
2 testes
2 epididymis
2 ductus deferens
Scrotum
Accessory sex glands
Urethra
Penis
Prepuce

• The long axis of each testes is VERTICAL Testes are located caudal to the sigmoid flexure
• Scrotum is elongated/pendulous
• Perineal

Accessory sex glands:

• AMPULLAE (not present)
• VESCULAR (large/lobulated)
• PROSTATE
• BULBOURETHRAL (very large)
• FIBROELASTIC PENIS
  (firm even when not erect)
• GLANS PENIS
  (small, twisted end)
• PREPUCE
  (has a pouch which collects urine, secretions and dead cells = smell of the boar)

Question 2

Stallion Reproductive

Answer 2

Produce sperm	
2 testes
2 epididymis
2 ductus deferens
Scrotum
Accessory sex glands
Urethra
Penis
Prepuce

• The long axis of each testis is HORIZONTAL
• Held close to the abdominal wall
  Accessory sex glands:
• AMPULLAE (well developed)
• VESICULAR (pear shaped/ hollow
• PROSTATE
• BULBOURETHRAL
• MUSCULOCAVERNOUS PENIS
  (flaccid when not erect)
• GLANS PENIS
  (have a urethral process)
• PREPUCE
  (double fold; 2 layers surround the penis when it is retracted

Question 3

Basic male reproductive tract

Answer 3

2 testes
2 epididymis
2 ductus deferens
Scrotum
Accessory sex glands
Urethra
Penis
Prepuce

Question 4

Testes

Answer 4

Basic structure the same

Contains mass of seminiferous tubules separated by interstitial tissue

Seminiferous tubules are lined with spermatogenic and sertoli cells

Question 5

Stallion testes

Answer 5

long axis of testis is horizontal

held close to the abdominal wall

Question 6

Boar Testes

Answer 6

long axis of each testis is vertical

caudal to the sigmoid flexure

ventral to the anus

perineal

Question 7

Accessory sex glands Boar

Answer 7

Ampullae - not present

Vesicular glands - large and lobulated

Prostate gland

Bulbourethral gland - very large

Question 8

Accessory sex glands Stallion

Answer 8

Ampullae - well developed

Vesicular glands - pear shaped and hollow

Prostate gland

Bulbourethral gland

Question 9

Ampullae

Answer 9

enlargement of the last part of the ductus deferens.

Well developed in the stallion. Not present in the boar

Question 10

Vesicular glands

Answer 10

Paired glands.

Pear shaped and hollow in the stallion.

In the boar are lobulated and of a considerable size.

Question 11

Prostate gland

Answer 11

unpaired gland which surrounds the urethra and has multiple ducts which empty into the urethra.

It produces an alkaline solution that gives semen its characteristic smell.

Question 12

Bulbourethral glands

Answer 12

Paired glands on either side of the urethra

These are very large in the boar.

Question 13

Stallion Penis

Answer 13

Musculocavernous penis

which has a predominance of blood sinuses instead of connective tissue.

This means the stallions penis is flaccid when not errect.

Question 14

Boar Penis

Answer 14

Fibroelastic penis

The trabeculae of the tunica albuginea make up the bulk of the penis which makes the penis firm even when not errect.

Question 15

Glans Penis Boar

Answer 15

The glans penis of the boar is small and has a twisted end.

Question 16

Gland Penis Stallion

Answer 16

The stallion has a free portion of the urethra called the urethral process.

Projects beyond the glans.

Question 17

Prepuce Stallion

Answer 17

Double fold so two layers surround the penis when it is retracted

Question 18

Prepuce Boar

Answer 18

Has a pouch dorsal to the preputial orifice.

This pouch collects urine, secretions and dead cells,

contributes to the distinctive smell of the boar.