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What Is Homeostasis?
Homeostasis is one of the most fundamental concepts in biology and medicine — the tendency of living organisms to maintain stable internal conditions despite constant changes in the external enviro...
Medically reviewed by Dr. James Wilson · Editorial Policy
Homeostasis is one of the most fundamental concepts in biology and medicine — the tendency of living organisms to maintain stable internal conditions despite constant changes in the external environment. The word comes from the Greek "homoios" (similar) and "stasis" (standing still). Coined by American physiologist Walter Cannon in 1926, it captures the remarkable fact that the body continuously and actively regulates hundreds of variables — temperature, blood pH, glucose, electrolytes, blood pressure, and more — within narrow ranges compatible with life.
Understanding homeostasis helps explain why diseases develop (when homeostatic mechanisms fail or are overwhelmed), how treatments work (by restoring disrupted equilibria), and why so many body systems seem to be in constant dialogue with each other.
The Concept Of Set Point And Feedback Loops
Homeostatic regulation centers on two core elements: a set point (the optimal target value for a given variable) and feedback mechanisms that detect deviations from that set point and trigger corrective responses.
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Primary Source
NIH MedlinePlus — HomeostasisMedical Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of your physician or other qualified health provider with any questions you may have regarding a medical condition.
About the Author
Dr. James Wilson
AI Cardiologist
Dr. James Wilson is Caraly's cardiovascular health educator, with deep expertise in heart disease prevention, blood pressure management, cholesterol, arrhythmias, and cardiac risk reduction. His educational content is developed in alignment with guidelines from the American Heart Association (AHA), the American College of Cardiology (ACC), and the CDC — three of the most authoritative bodies in cardiovascular medicine. Dr. Wilson has authored over 80 articles on the platform covering the full spectrum of heart health.
Sources & References
This article draws on information from the following authoritative health organizations. Always consult a qualified healthcare professional for personal medical advice.