Oxygen toxicity occurs when the body is exposed to high partial pressures of what?

Oxygen toxicity occurs when the body is exposed to high partial pressures of oxygen. This condition arises because increased levels of oxygen can lead to harmful physiological effects, particularly affecting the central nervous system and lungs.

When divers use gas mixtures with elevated oxygen concentrations, especially at greater depths where pressure increases, the partial pressure of oxygen can reach levels that can overwhelm the body's normal regulatory mechanisms. This can lead to symptoms such as visual disturbances, seizures, and in extreme cases, loss of consciousness.

Understanding the relationship between partial pressures and the gases inhaled is crucial for divers, as it helps them manage their exposure to oxygen and minimize the risks associated with toxic effects.

The other gases mentioned, while important in diving, do not create the same risk of toxicity when experiencing increased pressures as oxygen does.