Excessive protein detected in the urine usually means damage to the:

1. A specific finding points to a specific structure. 2. Urinalysis often provides clues to renal disease. 3. Excessive protein in the urine usually means the glomerulus is damaged. 4. It is allowing protein to leak into the filtrate. _Source: OpenStax Anatomy and Physiology 2e (CC BY 4.0), Ch 25 'The Urinary System', sections 25.1-25.10_