In a living person What do you call the lumen of a renal tube?

In a living person, the lumen of a renal tubule is referred to as the "renal tubule lumen." This is the hollow space within the renal tubule where filtration and reabsorption of substances occur during urine formation. The renal tubule includes structures such as the proximal convoluted tubule, loop of Henle, and distal convoluted tubule, each playing a critical role in the kidney's function.