What Is the Renal Tubule?
The renal tubule is an important structure in the kidney that contains tubular fluid, a filtrate that eventually becomes urine, and is excreted from the body. Renal tubules are part of the nephron, the basic functional unit of the kidney. Each normal human kidney has about 800,000 to one million nephrons, and each nephron has a renal tubule. The renal tubule is the end of the nephron. After the tubular fluid leaves the renal tubules, it passes on the the collecting duct system, which connects the nephron to the ureter, through which urine is excreted. The renal tubule has many important components.
