What are differences between diffusion and perfusion?

Diffusion is a general term which could be applied to many situations in which the movement of particles or waves from a region of high concentration or high energy to a region of low concentration or low energy exists. read more

Perfusion is the exchange of gases at the tissue level. Diffusion is the exchange of gases between the capillaries and alveoli. Ventilation is the gas exchange in and out of the lungs. So hypoxia is a perfusion problem and hypoxemia is a diffusion problem. This is the simplistic explanation. read more

The key difference between perfusion and diffusion is, perfusion is the blood flow through a certain mass of the tissue in a unit time whereas, diffusion is the passive movement of particles along a concentration gradient (gas exchange in alveoli). CONTENTS. 1. Overview and Key Difference 2. What is Perfusion 3. What is Diffusion 4. read more