The renin-angiotensin-aldosterone system (RAAS) is a hormone system that regulates blood pressure and fluid balance in the body. It involves the secretion of renin from the kidneys, which ultimately leads to the production of angiotensin II, a potent vasoconstrictor that increases blood pressure, and stimulates the release of aldosterone from the adrenal glands, promoting sodium and water retention. This system plays a crucial role in maintaining homeostasis and can significantly affect blood flow and pressure.
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