• Capillaries around the nephron, specifically the Loop of Henle, in the medulla that run parallel to the tubules

Definition Breakdown

  • Vasa” comes from the Latin root vās, which means vessels
  • Recta” comes from rēctus, which means straight
  • The term “straight vessel” should give you a hint into the difference between the vasa recta and the peritubular capillaries
    • Peritubular capillaries are more web-like
Vasa RectaPeritubular Capillaries
Renal MedullaRenal Cortex
Straight, parallel to tubulesWeb-like