Lindsay Modglin is a nurse and professional writer who regularly writes about complex medical topics, as well as travel and the great outdoors. She holds a professional certificate in scientific ...

A dangerously low oxygen level—usually below 92%—can cause shortness of breath, confusion, chest pain, or fainting. It’s often triggered by lung or heart conditions like COPD, asthma, or heart ...

Schematic of how individual red blood cells (RBCs) carry oxygen through capillaries to oxygenate tissues. The team found that RBCs can regulate how much oxygen is released in tissues, wherein ...

Smartwatches can measure everything from heart rate to sleep quality, but one health metric has become particularly relevant over the past two years: blood oxygen saturation. Two of the world’s ...

The process consists of multiple overlapping steps, including blood flow, diffusion of oxygen, chemical reactions inside cells, and oxygen uptake by tissues. As these processes occur simultaneously ...