name two gases of air which dissove in water by diffusion. what is the importance of this process in nature?

Carbon-di-oxide and Oxygen are the two atmospheric gases, that can diffuse in water. The process of diffusion is very important, as this process helps in respiration, the oxygen from lungs diffuses into the blood stream, and reaches our cells. Fishes are able breathe under water due to diffusion of dissolved oxygen in water, in their lungs.