Question

Prescrotal sigmoid flexure is found in
A. Stallion
B. Bull
C. Boar
D. Buck
Choose the correct answer from the options given below

• A. A only
• B. B only
• C. C only
• D. All A, B, C and D

Hint:

Sigmoid Flexure Locations:
PRE-SCROTAL (Cranial to Scrotum) = BOAR (Pig).
POST-SCROTAL (Caudal to Scrotum) = BULL, RAM, BUCK (Ruminants).
Absent = Stallion, Dog.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Comparative anatomical localization of the fibroelastic penile sigmoid flexure in domestic ungulates: prescrotal in swine vs postscrotal in ruminants.
Key Formula or Approach:
\[ \text{Prescrotal Sigmoid Flexure} = \text{Boar (Pig)} \quad | \quad \text{Postscrotal Sigmoid Flexure} = \text{Bull, Ram, Buck} \]

Step 2: Detailed Explanation:
In male reproductive anatomy:
1. Boar (Pig) (C only): The fibroelastic penis possesses an S-shaped Prescrotal Sigmoid Flexure located cranial (anterior) to the scrotum, terminating in a corkscrew-shaped glans penis.
2. Ruminants (Bull, Ram, Buck): The fibroelastic penis possesses a Postscrotal Sigmoid Flexure situated caudal (posterior) to the scrotum.
3. Stallion Dog: Possess a musculocavernous penis with no sigmoid flexure.
Therefore, prescrotal sigmoid flexure is present in C only (Boar).

Step 3: Final Answer:
Hence, prescrotal sigmoid flexure is found in C only, matching option (C).