Capillary exchange of gases, nutrients, and waste is accomplished by diffusion, osmosis, and filtration.

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Capillary exchange involves the movement of gases (like oxygen and carbon dioxide), nutrients (such as glucose), and waste products between blood and tissues. This process is facilitated by diffusion (movement of substances from an area of higher concentration to an area of lower concentration), osmosis (movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration), and filtration (movement of water and solutes through a membrane by a higher hydrostatic pressure on one side). These mechanisms ensure efficient exchange of materials necessary for cellular functions and removal of wastes.

Capillary Exchange of Gases, Nutrients, and Waste Is Accomplished by Diffusion