Proximal convoluted tubules (PCTs)

Definition

Proximal Convoluted Tubules are the twisted segments of the nephron located in the kidney’s cortex, immediately following Bowman's capsule, where most of the reabsorption of water, ions, and nutrients from the filtered blood takes place. Their structure increases surface area to maximize reabsorption efficiency.

Related terms

Nephron:

The functional unit of the kidney, responsible for filtering blood and producing urine.

Glomerulus: A network of capillaries encased in Bowman's capsule at the start of each nephron that filters blood entering the kidney.

Loop of Henle:

A U-shaped tube that follows the PCT in each nephron, crucial for concentrating urine and conserving water