What is the primary method by which materials such as O₂, CO₂, and nutrients are exchanged between the blood and surrounding tissues?

Question

Quizplus · Accepted Answer

The primary method by which materials such as O₂, CO₂, and nutrients are exchanged between the blood and surrounding tissues is passive diffusion across the capillary wall down their concentration gradients. This occurs due to the small size and permeability of capillaries, allowing for efficient exchange of gases and nutrients between the blood and tissues. Active transport, osmotic pressure, ultrafiltration and reabsorption, and bulk flow may also play a role in some cases, but passive diffusion is the primary method.

What Is the Primary Method by Which Materials Such as O₂