What concept does Dalton's Law primarily pertain to?

Dalton's Law primarily pertains to the concept of partial pressures of gases. This law states that in a mixture of non-reacting gases, each gas exerts its own pressure as if it were the only gas present. The total pressure of the gas mixture is the sum of the partial pressures of each individual gas. This principle is crucial in understanding how gases behave in various biological and environmental contexts, such as gas exchange in the lungs, where the partial pressures of oxygen and carbon dioxide play a significant role in diffusion. Recognizing the individual contributions of each gas allows for a better understanding of respiratory physiology and the dynamics of gas mixtures in different scenarios.