Kidney Tubules

**Renal tubules** are narrow long channels that form the filtration apparatus. About 11 billion of them pass through the kidney, and the length of the tubules is 4 times the length of the human body. The renal tubules form the papillary layer of the kidney pyramids. The tubules are the final structural units of the kidney: its entire nephrotic functional unit is arranged in three tubules. In the kidney, the glomeruli and the distal part of the tubules are closely connected, into which the initial convoluted urinary tubule emerges - it is in no way connected with the entire genitourinary system. In the distal tubules (loops of Henle), reabsorption of water from the liquid into the blood occurs, ultrafiltration continues, but the transport of vital substances has already stopped. The purified fluid enters the collecting duct, which opens into the ureter.

**Renal tubules:** (lat. tubulus renalis), part of the urinary system of vertebrates and humans, through which urine is formed due to the reabsorption of various substances from it (primarily electrolytes).

The wall of each renal tubule contains nephrons, urine-forming structures.

Renal tubules are structures inside the kidney that function in filtering blood and producing urine. They form a continuous system of more than 2 million microscopic tubules that form a single kidney. Each tubule has its own lumen, and blood flows through it to reach the filtration organs. Besides