Slide 16 Pancreas
Islets are distinguished from the surrounding exocrine tissue by a continuous connective tissue capsule and an extensive microvascular that first bathes the center of the islet that is rich in B or beta (insulin) cells, and then the periphery where most of the A or alpha (glucagon) cells are located. Within the islet, the glucagon-secreting alpha cells stain red while the insulin-secreting beta cells stain blue. (Gomori Stain)

Bar = 30 MM

Expanded View