MEDICAL ANIMATION TRANSCRIPT: The body filters drugs from the bloodstream and eliminates them in a multi-step process called medication excretion. The kidneys are the major route for drug elimination. Most drugs exit the body either unchanged or as drug metabolites in urine. Generally, health professionals refer to the ability of the kidneys to filter blood as renal function. Nephrons, the functional and anatomical units of the kidney, filter blood, regulate fluid volume and pH, and control levels of electrolytes in the body. Each nephron contains a renal corpuscle and renal tubule. The renal corpuscle includes the Bowman capsule and glomerulus. And the renal tubule is composed of the proximal tubule, loop of Henle, distal tubule, and collecting duct. Each component plays a role in renal drug excretion, a four-step process that allows the kidneys to filter and eliminate drugs from the body. These steps are: glomerular filtration, passive tubular reabsorption, active tubular secretion,...