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Anesthesia topic icon.  


Anesthesia is a medical treatment that prevents patients from feeling pain during procedures like surgery, certain screening and diagnostic tests, tissue sample removal (e.g., skin biopsies), and dental work. Learn more about anesthesia and the field of anesthesiology, as well as what scientists know—and are still learning—about these medications.

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Circadian rhythms topic icon.  

Circadian Rhythms

Our bodies keep time with the help of 24-hour "circadian" rhythms, which are directed by genes. Get answers to common questions about how these rhythms work and affect our lives.

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Regeneration topic icon.  


Regeneration is the natural process of replacing or restoring damaged or missing cells, tissues, organs, and even entire body parts to full function in plants and animals. Learn more about regeneration and its potential uses in medicine.

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Sepsis is a person’s overwhelming or impaired whole-body immune response to an insult—an infection or an injury to the body, or something else that provokes such a response. Get more information about the causes, impacts, and treatment of sepsis.

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