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.
Untreated Depression and Shortened Telomeres Untreated depression creates biological changes that accelerate aging and increase the risk of life-threatening diseases. Major Depressive Disorder (MDD) can shorten the length of telomeres. A team led by Owen Wolkowitz, MD, professor of psychiatry at UC San Francisco (UCSF) has been studying the biological link between chronic depression and an enzyme called telomerase which is linked to shorter telomeres.