The vasa recta are specialized capillary networks that play a crucial role in kidney function. Specifically, the vasa recta are the capillary networks that supply blood to the medulla of the kidney. They run parallel to the loops of Henle and are highly permeable to both solute and water.
Key Characteristics of Vasa Recta
Here's a breakdown of the key characteristics of the vasa recta:
- Function: Supply blood to the renal medulla.
- Structure: Hairpin-shaped loops parallel to the loops of Henle.
- Permeability: Highly permeable to both solutes and water, which is crucial for maintaining the concentration gradient in the medulla.
- Location: Found within the medulla of the kidney.
Role in Kidney Function
The unique structure and permeability of the vasa recta allow them to maintain the osmotic gradient established by the loops of Henle, which is essential for the concentration of urine. Because the loops of Henle and vasa recta work so close to each other, they are referred to as a counter-current system.
