The exocrine acini of the pancreas are seen around the islet.

In this islet the closely packed glandular cells are generally lightly stained. Some of these cells are acidophilic and correspond to the acidophils (A) which secrete glucagon. The lightly stained cells correspond to the basophils (B) which secrete insulin.

The other cells of the islet, that is, the D cells, which secrete somatostatin, and the F cells, which secrete a specific pancreatic polypeptide, can be demonstrated only with immunocytochemical methods.

The capillaries associated with the islet are barely visible in this section.

Stain: H–­­E
Magnification: ×600