The Renin-Angiotensin-Aldosterone system is the system in the human body that is responsible for the sensation and control of blood pressure. Renin-Angiotensin-Aldosterone is a hormone system that regulates blood pressure and fluid balance. RAAS is a hormonal cascade that functions in the homeostatic control of arterial pressure, tissue perfusion, and extracellular volume. Dysregulation of the RAAS plays an important role in the pathogenesis of cardiovascular and renal disorders. The hormone increases the volume of extracellular fluid in the body, and at the same time also increases blood pressure. not only within the kidneys, but all over the body.
What do you think could happen if that system was not in place or was malfunctioning?
Since the renin–angiotensin–aldosterone system plays such a significant role in preserving hemodynamic stability in response to the loss of blood volume, salt, and water if it were to malfunction then local systems like the kidneys, brain, heart, blood vessels, and adrenal glands may risk vascular inflammation and fibrosis.

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