VAN 221: Veterinary Splanchnology and Applied Anatomy (1+1)

SEMINAL VESICLE
( Bull, Ram, Buck, Stallion, Boar, Dog, Cock, Rabbit )

Bull

• These are two compact glandular organs with a lobulated surface
• They are situated on the dorsal surface of the bladder
• Dorsally they are related to rectum. It is about 10 to 12 cm, long 5 cm wide and 3 cm thick
• Each consists of a thick walled tube folded on itself in a tortuous manner
• The excretory ducts open on either side of the colliculus seminalis lateral to the openings of the vas deferens, at the ejaculatory orifices

Species difference

Ram and Buck

• It resembles that of bull

Stallion

• They are two elongated and pyriform sacs
• Each consists of a rounded blind end - fundus, a middle narrow part- body and a caudal constricted part - neck or duct. Each is about 15 to 20 cm long
• The excretory duct opens in common with or along side the vas deferens in a pouch of mucous membrane on the side of colliculus seminalis

Boar

• The glands are exceedingly large
• They are distinctly lobulated and glandular
• About half a dozen or more large thin walled ducts emerge from the medial surface of each and converge to a smaller excretory duct and this terminates at a slit like opening on the colliculus seminalis

Dog & Cock

• Absent

Rabbit

• It is medially situated and opens into the prostatic segment of the urethra immediately in front of the colliculus seminalis