What term is used to describe the main trunk of the body?

The term "torso" refers specifically to the central part of the body from which the limbs extend. It comprises key structures including the thorax and abdomen. The torso encompasses vital organs and plays a crucial role in supporting and protecting these organs, as well as serving as the attachment point for the limbs.

In contrast, the other options represent different anatomical concepts. "Limbs" refers to the arms and legs, which extend from the torso. "Cavities" typically denote spaces within the body, such as the thoracic or abdominal cavity, that house organs but do not refer to the main body trunk itself. "Viscera" refers to the internal organs, particularly those within the abdominal cavity, but it does not denote the main trunk of the body.

Understanding the correct terminology is essential in medical contexts to accurately describe locations, relationships, and functions of various body parts.