Development of the endocrine system alpha cells. The insulin concentration within the fetal pancreas is 3.6 pmol/g at seven to ten weeks, which rises to 30 pmol/g at 16–25 weeks of gestation. Near term, the insulin concentration increases to 93 pmol/g. The endocrine cells have dispersed throughout the body within 10 weeks. At 31 weeks of development, the islets of Langerhans have differentiated. While the fetal pancreas has functional beta cells by 14 to 24 weeks of gestation, the amount of insulin that is released into the bloodstream is relatively low. In a study of pregnant women carrying fetuses in the mid-gestation and near term
Ryan Langerhans Ryan Langerhans Ryan David Langerhans (born February 20, 1980) is an American former professional baseball outfielder. Langerhans was drafted in the third round of the 1998 Major League Baseball draft by the Atlanta Braves, and made his debut with them in 2002. He has also played in Major League Baseball for the Oakland Athletics, Washington Nationals, Seattle Mariners, Los Angeles Angels of Anaheim, and Toronto Blue Jays. Langerhans attended Round Rock High School in Round Rock, Texas. During the 1996 season, Langerhans batted .442 and was selected to the All-State team. His next season, 1997, Langerhans batted .427 and was