Which body cavity contains the major organs of digestion and excretion?

The abdomen is the body cavity that contains the major organs responsible for digestion and excretion. This cavity houses essential organs such as the stomach, intestines, liver, gallbladder, pancreas, and kidneys. Each of these organs plays a critical role in processing food, absorbing nutrients, and eliminating waste.

In addition, the abdomen is positioned between the thorax and pelvis, distinguishing it as the region where these vital functions occur. Understanding the organization of the body's cavities helps in both assessing and managing conditions related to gastrointestinal health and urinary functions. The other options, while containing important structures, do not primarily encompass the major organs involved in these processes.