Practical problems such as breathing at high altitude have in recent years focused attention on the marvelous system that brings oxygen to the blood and removes ...

However, the exact mechanisms involved in insect respiration are difficult to visualize and have therefore been difficult to characterize. In the January 24 Science, Mark W. Westneat and colleagues at ...

Throughout his life, Mitchell saw the detailed mechanism of respiration in this far broader sense: Membrane proteins can create gradients across a membrane, and these gradients can in turn power work.