The endocrine and exocrine cells in pancreas originate initially from a group of apparently identical endoderm cells in the early gut. The endocrine and exocrine tissues are composed of islet/acinar and duct cells respectively. To explore the mechanism of pancreas cell fate decisions. we first construct a minimal mathematical model related to pancreatic regulations. https://www.balboasurfandsstylers.shop/product-category/balboa-l-s-tees/