Urinalysis is the chemical and physical analysis of a urine sample. It involves the color and appearance of urine, plus a detailed list of specific compounds and their concentration found in the sample. Substances that should not be found in urine are proteins, glucose, acetone, blood, and pus. The presence of any of these substances may indicate a disease.
The process of urine formation. (From Premkumar K. The Massage Connection Anatomy and Physiology. Baltimore: Lippincott, Williams & Wilkins, 2004.)