Exchange of Gases

The video explains the process of diffusion, where molecules move from high to low concentration. It covers gaseous exchange at the alveoli and tissue levels, known as external and internal respiration. Factors affecting diffusion include partial pressure, membrane structure, solubility, and surface area. The video details how oxygen and carbon dioxide are exchanged in the lungs and tissues, emphasizing the role of partial pressure gradients.

What is the significance of the total surface area of the lungs in gas exchange?

Explain the role of partial pressure in the diffusion of gases during respiration.

Describe the process of carbon dioxide diffusion from the tissue fluid into the capillary blood.