Weegy: The pancreas is composed of two types of functional tissue: groups of cells termed the islets of Langerhans and ducts called the pancreatic acini. The islets of Langerhans are the portion of the pancreas that manufactures and secretes hormones. [ The pancreatic acini make and secrete the pancreatic enzymes as well as bicarbonate ions used to neutralize stomach acids.
Read more: What Is the Function of the Pancreas? | eHow.com
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