Which organ system does NOT provide for the excretion of substances?

• A. Digestive
• B. Urinary
• C. Lymphatic
• D. Endocrine

Answer: (C)

Excretion is the process of removing metabolic wastes from the body. The digestive system handles solid wastes by forming feces and eliminating them through the digestive tract, while the urinary system removes soluble wastes and helps regulate water and electrolyte balance by producing urine. The endocrine system’s role is to release hormones into the bloodstream to regulate bodily functions, not to excrete wastes. The lymphatic system moves interstitial fluid and supports immunity, but it is not a primary route for eliminating metabolic wastes. So the organ system that does not provide for excretion is the lymphatic system.