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Pacinian corpuscles in pancreas (40X)

Microimage
Image copyright: Mathias Nordvi, ARR. (Tissue stain: H+E).

This section is from the pancreas. You can clearly see the lobulated structure. The majority of the cells comprising the lobules (lat: lobuli) belong to the exocrine part of the pancreas. These stain dark red/purple in this section. In between these serous acini (the exocrine cells), you'll find cells which belong to the endocrine part of the pancreas. These are the pancreatic islets which produce insulin.

The large onion shaped structure is a pacinian corpuscle.