Ans. Excretory products play a crucial role in maintaining homeostasis, which refers to the stable internal environment of the body. By eliminating waste products such as carbon dioxide, urea, and excess salts, the excretory system helps regulate the pH balance, electrolyte levels, and water content in the body. This ensures that the body's internal environment remains stable and functions optimally. Without the elimination of excretory products, the accumulation of waste substances would disrupt the body's balance, leading to various health problems.