What is the primary function of the organs contained in the abdominal cavity?

The primary function of the organs contained in the abdominal cavity is indeed centered on managing nutrient absorption and waste elimination. This cavity houses vital organs such as the stomach, intestines, liver, and pancreas, all of which play crucial roles in digestion and metabolism.

The stomach and intestines are integral for breaking down food, allowing for nutrient absorption into the bloodstream, which is essential for providing energy and maintaining bodily functions. The liver further supports this by processing nutrients and detoxifying harmful substances. Additionally, the kidneys, which are located in the retroperitoneal space, perform the essential function of waste elimination by filtering blood and excreting waste products through urine.

The other choices pertain to different functions and systems. Supporting the body's structure relates more to the skeletal system, protecting the central nervous system pertains to the skull and vertebral column, and producing red blood cells is primarily the function of the bone marrow within the skeletal system, not the abdominal cavity. Thus, option B accurately characterizes the main role of the organs located in the abdominal cavity.