The renal system’s histology reveals a highly specialized arrangement of epithelial, vascular, and interstitial structures that work together to filter blood, regulate electrolytes, and maintain fluid balance. Each region of the kidney has distinct microscopic features that reflect its function, from ultrafiltration in the cortex to concentration of urine in the medulla. 🧫 Renal Cortex The cortex contains the renal corpuscles and the initial segments of the nephron. Key structures include: - Gl