The pyloric sphincter prevents the regurgitation of chyme from the duodenum into the stomach. It also controls the flow of chyme into the intestine, which provides the intestines with a manageable volume of chyme from which to absorb nutrients.
Pittsburgh star James Conner diagnosed with cancer. Conner says he has Hodgkin lymphoma, but he vows to play again.
Introduction. 1  The Hedgehog (Hh) gene was initially discovered by Christiane Nusslein-Volhard and Eric F. Weischaus in 1980 in their screen for mutations that disrupt the Drosophila larval body plan [Nusslein-Volhard and Wieschaus, 1980].