Diffusion Processes

Abstract

The subject of diffusion is one of great practical and theoretical importance in the biological sciences. Every cell, of every organism, at every moment of its existence, is dependent upon this process for supplying it with necessary materials from its surroundings, for distributing these and other materials within its boundaries, and for removing to a safe distance metabolic products which if allowed to accumulate would be injurious. However slightly different cells may resemble one another in other respects, they all show a common dependence upon this, the most widespread of all cellular activities.