VGO-0208
QUESTION
Sigmoid flexure is absent in?
OPTIONS
(A) Stallion
(B) Bull
(C) Boar
(D) Ram
ANSWER
(A) Stallion
EXPLANATION
The stallion has a musculocavernous penis that enlarges substantially during erection and lacks a sigmoid flexure. Bulls, boars, and rams have fibroelastic penises, in which straightening of the sigmoid flexure contributes to protrusion. Its position differs between species, but it is present in all three of those alternatives. Absence of the flexure therefore identifies the stallion.
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Veterinary Gynaecology and Obstetrics · 240 Questions
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