At the center of the renal system are the kidneys: kidneys are complex organs to understand, which is why the renal system is challenging for students who haven’t taken physiology yet. The MCAT won’t test the intricate anatomy of kidneys (that’s for med school!), but the test does cover the main functions of the kidney, the basic structure of the nephron, and how the renal system is involved with other body systems. Tune in to learn more about the renal system!