Oxygen levels, or oxygen saturation, refer to the amount of oxygen present in the blood. This is a critical measurement in medical and physiological research, as adequate oxygen levels are essential for the body to function properly. Low oxygen levels, known as hypoxemia, can lead to serious health complications and may be indicative of underlying medical conditions such as respiratory disorders, heart disease, or certain infections. Monitoring and maintaining proper oxygen levels is crucial in medical settings, such as during surgery, intensive care, or for patients with respiratory conditions. Research in this area aims to better understand the mechanisms of oxygen delivery and utilization in the body, as well as develop effective interventions to improve oxygen levels and overall health outcomes.