Research Article
The Ultrastructure of Secretory Cells of the Islets of Langerhans in South American Catfish Rhamdia quelen
Figure 7
Several β-cells in an islet, β-granules (straight arrows), and granular endoplasmic reticulum are reduced, but other organelles are normal. Two small desmosomes are indicated (curved arrows). G: Golgi complex; M: mitochondrion; N: nucleus; cer: ceroid granules. X 13.700.