Blood oxygen levels refer to the amount of oxygen circulating in the blood. Normal blood oxygen levels fall between 75 and 100 millimeters of mercury (mm Hg) on arterial blood gas (ABG) test results.

High-resolution fluorescence imaging of a tissue cross-section highlighting cellular boundaries (red) and nuclei (grey).

Some animals can regrow lost body parts. Salamanders and frog tadpoles can rebuild entire limbs after amputation. Mammals ...

Oxygen has provided a breath of fresh air to the study of the Earth's evolution some 400-plus million years ago. A team of researchers, including a faculty member and postdoctoral fellow from ...

Reducing oxygen levels in critically ill children on mechanical ventilators in intensive care could save tens of young lives each year, finds a new study led by researchers at UCL and Great Ormond ...

Learn how testing different environmental conditions may unlock mammals’ potential to regrow limbs and what it means for ...

For the past few weeks, the Pixel Watch has been missing estimated oxygen variation (EOV) data in the Fitbit app, but the graph is now back. This metric is an “approximation of the changes in your ...