Fluid-filled pores separate materials with precision
Friday, March 6, 2015 - 09:30
in Physics & Chemistry
In nature, pores can continuously control how a living organism absorbs or excretes fluids, vapors and solids in response to its environment; for example, tiny holes invisible to the naked eye called stomata cover a plant's leaves and stems as gated openings through which oxygen, carbon dioxide and water vapors are transported in and out during photosynthesis and respiration. And some scientists have proposed that micropores in the tissues of the air sacs of human lungs can open or close to modulate fluid flow based on changes in air pressure or inflammation.