A computer-generated image of red blood cells. Nitric oxide—known by the formula NO—is so vital for humans’ internal physiological processes that it was crowned Molecule of the Year in 1992. It plays ...

Your sympathetic nervous system is one of the branches of your autonomic nervous system. It controls functions under unconscious control related to “fight or flight.” Your nervous system plays a ...

Most people rarely think about how they breathe unless experiencing respiratory distress. Yet emerging research suggests that the pathway through which we inhale and exhale – nose versus mouth – ...

Having excess body weight can increase your blood pressure and affect your immune system. Learn what happens to blood ...

Renin-angiotensin system, or RAS, is a physiological mechanism essential to human body function. The SARS-CoV-2 virus causes overactivation and malfunction of this system. The RAS regulates innate ...