The pancreas is composed of two distinct types of glandular tissue.
The pancreatic acini of the pancreas are drained
by exocrine ducts, of which various sizes form a branching system.
Embedded within the pancreatic acini tissue are clusters of endocrine cells
constituting the pancreatic islets (islets of Langerhans) which are
The little box in the adjoining image indicates where the picture
below came from.