3 articles
Osmosis is the passive diffusion of water — not solute — across a semipermeable membrane toward the more concentrated side, driven by chance and stopped only when water potential equalizes.
How each breath is a passive physics problem: oxygen diffusing down a partial-pressure gradient across the alveolar membrane, loaded onto hemoglobin by an S-shaped curve built for delivery.
How the jittery path of a pollen grain became the mathematical foundation of diffusion, drug delivery, and molecular biology.