Purves of Harvey Mudd College responds: Parietal cells in the mucosa, the inner cell layer of our digestive tract, secrete hydrochloric acid (HCl) into the stomach's lumen, or cavity. The solution ...

rather than into the stomach lumen. In initial tests in pigs the researchers showed that the self-orienting millimeter scale applicator (SOMA) could successfully deliver insulin to the bloodstream ...

Helicobacter pylori, one of the world's most widespread pathogenic human colonizers, has revealed to researchers another of its survival secrets—one that experts hope might help in the search ...