How oxygen toxiticy and nitrogen narcosis occurs?
Oxygen toxicity occurs when high levels of oxygen, typically above 1.4 atmospheres, lead to the production of reactive oxygen species, which can damage cells and tissues, particularly in the central nervous system and lungs. Nitrogen narcosis, often referred to as "the bends" or "rapture of the deep," occurs when divers descend to depths greater than 30 meters (100 feet), causing nitrogen to dissolve in the bloodstream and affect brain function, leading to symptoms similar to intoxication. Both conditions highlight the physiological limits of human adaptation to changes in pressure and gas composition during deep-sea diving.