What term is used to refer to the underside of an animal?

The term that refers to the underside of an animal is "ventral." In anatomical terminology, the ventral aspect or surface of an animal is the part that faces down toward the ground when the animal is in a natural standing position. This terminology is particularly important in veterinary medicine and biological sciences, as it provides a standardized way to describe the locations and orientations of body parts.

In contrast, the term "dorsal" refers to the upper side or back of the animal. "Medial" indicates a position towards the midline of the body, while "peripheral" describes areas that are away from the center, particularly in relation to limbs and extremities. Understanding these terms is crucial for accurately communicating about animal anatomy and any associated medical concerns.