Welcome to Lesson 20 of the Human Biology Masterclass.
In this lesson, we explore the kidneys and urinary system — a major homeostatic system that continuously filters the blood, removes metabolic waste, and helps regulate water, electrolytes, blood pressure, and the body's internal chemical environment.
The kidneys work closely with the cardiovascular, respiratory, and endocrine systems. Together, these systems help maintain the stable internal environment required for cells to function properly.
Understanding kidney physiology provides an essential foundation for studying fluid balance, electrolytes, acid–base regulation, exercise physiology, metabolism, and homeostasis.
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