What is primarily eliminated by the excretory system?

The excretory system, also known as the urinary system, is mainly responsible for the removal of waste products from the body. Its primary function is to filter blood and eliminate waste in the form of urine, which includes substances such as urea, creatinine, and excess salts. These waste materials are byproducts of metabolism and are typically toxic to the body in high concentrations, thus making their removal essential for maintaining homeostasis and overall health.

While gases like carbon dioxide are expelled during respiration and electrolytes play critical roles in bodily functions, the specific function of the excretory system is to handle waste elimination. Enzymes, on the other hand, are biological catalysts involved in metabolic processes but are not substances that are eliminated by the excretory system. The focus of the excretory system is inherently linked to waste management, reinforcing the importance of this system in maintaining the body’s internal environment.