Which of the following systems is NOT involved in waste removal?

The correct answer highlights the role of the nervous system in relation to waste removal processes in the body. While the nervous system plays an essential role in regulating and coordinating bodily functions, it is not directly involved in the physical processes of waste removal. In contrast, the other systems listed perform specific functions related to eliminating waste:

• The respiratory system removes carbon dioxide, a waste product of metabolism, through the exhalation of air.

• The genitourinary system, which includes the kidneys and urinary tract, eliminates substances like urea and excess salts through urine production.

• The digestive system processes food and expels solid waste through defecation.

In summary, while all the other systems listed are actively involved in the waste removal process, the nervous system does not directly contribute to this function. Instead, it oversees communication and coordination among various bodily systems.