What system is responsible for removing waste from the body?

The excretory system is primarily responsible for removing waste from the body. This system includes organs like the kidneys, ureters, bladder, and urethra, which work together to filter blood, remove waste products, and regulate fluid balance. The kidneys play a crucial role as they filter toxins and waste products from the bloodstream, which are then excreted as urine.

While the digestive system contributes to waste elimination by processing food and expelling solid waste, it does not handle metabolic wastes like the excretory system does. Similarly, the respiratory system is involved in the exchange of gases, primarily removing carbon dioxide but not waste in the broader context of metabolic waste. The circulatory system's main function is to transport nutrients, gases, and wastes throughout the body rather than remove them. Thus, the excretory system is specifically designed for the purpose of waste removal, making it the correct response for this question.