Question

dorsum refers to:
a the back or outer surface of an organ or part.
b small animal feeding schedules
c aquatic disease
d organs in the torso of an animal

Explanation:

In anatomical terminology, "dorsum" specifically denotes the back or outer surface of an organ or body part. Options B (small animal feeding schedules) and C (aquatic disease) are completely unrelated to the anatomical meaning. Option D (organs in the torso of an animal) is too vague and not the correct definition for "dorsum".

Answer:

A. the back or outer surface of an organ or part.