Home▸Medical Technology & Imaging Physics▸The Renin-Angiotensin-Aldosterone System: How the Body Balances Blood Pressure and Sodium

🩸 The Renin-Angiotensin-Aldosterone System: How the Body Balances Blood Pressure and Sodium

Explore the RAAS hormonal cascade, the slow but powerful system that raises blood pressure over hours to days by triggering vasoconstriction and sodium retention, and see why it is the prime target of common blood pressure medications.

Medical Technology & Imaging Physics3DModerate60 FPS

The interactive 3D simulation visualizes the full RAAS cascade in sequence, from renin release by kidney juxtaglomerular cells through angiotensin I and II formation in the lungs to aldosterone-driven sodium and water retention in the kidney, showing how each step compounds to raise blood pressure over time.

🔬 What It Demonstrates

🎮 How to Use

Adjust the starting blood pressure or blood volume slider to simulate hemorrhage, dehydration, or a low-sodium state, then watch each hormone activate in sequence and observe how blood pressure and blood volume recover over a simulated timescale of minutes to days.

💡 Did You Know?

A single pass of blood through the lungs converts most circulating angiotensin I into angiotensin II, meaning the lungs, not just the kidneys, are an essential organ in blood pressure regulation.

⚙ Under the hood

physiologyraasblood pressurekidneyhormonesaldosteronehypertensioncardiovascular

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install