06/23/2026
🩺 RAAS System (Renin-Angiotensin-Aldosterone System)
The RAAS system is the body's built-in mechanism for regulating blood pressure, fluid balance, and electrolyte levels.
🔹 Low blood pressure, low blood volume, or reduced kidney blood flow triggers the release of renin.
🔹 Renin converts angiotensinogen into angiotensin I.
🔹 ACE (Angiotensin-Converting Enzyme) converts angiotensin I into angiotensin II.
🔹 Angiotensin II causes blood vessels to constrict, increasing blood pressure.
🔹 It also stimulates the release of aldosterone from the adrenal glands.
🔹 Aldosterone promotes sodium and water retention by the kidneys, further increasing blood volume and blood pressure.
📌 Key Function:
Maintain adequate blood pressure and ensure proper organ perfusion.
