Histology and ultrastructure of the adrenal gland ofRhacophorus leucomystax(Amphibia, Anura)

Functional stages in the interrenal cells of Rana perezi (Anura: Ranidae)

The electron density of the lipid droplets and mitochondrial matrix of the interrenal cells of Rana perezi differs during the year. This makes it possible to characterize the different stages of interrenal cell activity. A droplet/mitochondria index, based on their relative size, may provide an indicator of cellular activity.