What is the term for the internal contents of a cavity?

The term that refers to the internal contents of a cavity is "viscera." This term is commonly used in medical settings to describe the organs located within the major body cavities, particularly those in the thoracic and abdominal regions. For example, the viscera include the heart and lungs in the thoracic cavity, as well as the stomach, liver, and intestines in the abdominal cavity.

Understanding this terminology is crucial for healthcare professionals, as it allows for precise communication about the body's anatomical structure and its various components. The other options do not accurately describe the internal contents of a cavity. "Torso" refers to the trunk of the body but does not specify the internal contents. "Cavities" refers to the hollow spaces within the body but does not indicate what is found inside those spaces. "Limbs" denotes arms and legs, which are external structures and not relevant to the question about internal contents.