Chapter 67 - Urethra

Question 1

1. How long is the male urethra?

Answer 1

• 75 – 90 cm

Question 2

2. The colliculus seminalis is located where and is the site of what structures?

Answer 2

• ~5cm caudal to the urethral orifice
• Paired ejaculatory ducts (ductus deferens and seminal vesicles)

Question 3

3. Where are the openings of the prostatic ducts?

Answer 3

• They are arranged as 2 groups of small papillae on either side of the colliculus seminalis

Question 4

4. What is the urethral sinus (diverticulum of the glans)?

Answer 4

• A bilobed, recessed area which can accommodate the fingertip and is the site where the “bean” of smegma accumulates

Question 5

5. The urethra is encased in what muscle of the penis?

Answer 5

• corpospongiosis muscle

Question 6

6. What muscle surrounds the majority of the male urethra?

Answer 6

• Urethralis muscle

Question 7

7. How long is the mare urethra?

Answer 7

• 5cm

Question 8

8. Where is the external opening of the urethra in the mare?

Answer 8

• At the anterior end of the vestibule

Question 9

9. The urethral muscle of the mare is continuous with the ________ muscle

Answer 9

• constrictor vestibule muscle

Question 10

10. T/F: Bovine kidneys are smooth and small ruminant kidneys are lobulated.

Answer 10

• False, bovine are lobulate, small ruminant kidneys are smooth