Which two body systems primarily function to rid the body of wastes resulting from cellular energy production?

The two body systems that primarily function to rid the body of wastes from cellular energy production are the excretory (or urinary) system and the respiratory system. The excretory system, which includes the kidneys, filters blood to remove waste products and excess substances, primarily in the form of urine. The respiratory system expels carbon dioxide, a byproduct of cellular respiration, through the lungs during exhalation. Together, these systems help maintain homeostasis by eliminating harmful byproducts from the body.