Boyle's Law
Boyle's Law basically states that gas pressure and volume are inversely related. What this means is that the smaller the space the gas is contained in, the greater the pressure of the gas in that container. Imagine that gas molecules are ping pong balls in a big box. They don't interact very much. Then you put the same amount in a smaller box and a smaller box, they interact more and more. As they interact more, the pressure increases.
Boyle's Law explains how the air gets in and out of your lungs, that is, how it travels through the conducting system and fills the alveolar sacs. It works like this: Gas pressure changes in your thoracic cavity in response to your muscles contracting and your ribcage expanding.
Daltons Law:
Dalton's Law of Partial Pressures describes how pressure gradients can facilitate diffusion for individual gases between your blood and lungs. And Henry's Law explains how gases can move into and out of solution—in the case of our bodies, how oxygen and carbon dioxide can dissolve and diffuse out of the blood
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