. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ;, -- ->â¢:â â Jf-*d& .«»"?***⢠4 ' ,., 1. 7" r Fig. 1. Typical ground squirrel burrow site on Arctic slope of Alaska. Near Meade River, Alaska, September, 1952. Fig-. 2. Section of the intra- lobar duet of the submaxillary gland from a warm and active Arctic- ground squirrel. Heavy concentrations of PAS-positive granules surround the lumina. Fig. 3. The intralobar ducts of the submaxillary gland of an Arctic- ground squirrel in hibernation for three weeks. Only isolated PAS-positive granules can b
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ;, -- ->â¢:â â Jf-*d& .«»"?***⢠4 ' ,., 1. 7" r Fig. 1. Typical ground squirrel burrow site on Arctic slope of Alaska. Near Meade River, Alaska, September, 1952. Fig-. 2. Section of the intra- lobar duet of the submaxillary gland from a warm and active Arctic- ground squirrel. Heavy concentrations of PAS-positive granules surround the lumina. Fig. 3. The intralobar ducts of the submaxillary gland of an Arctic- ground squirrel in hibernation for three weeks. Only isolated PAS-positive granules can be seen. Fig. 4. The acinar part of the submaxillary gland of the Arctic ground squirrel stained with hematoxylin and eosin. Finely granular cytoplasm, pyramidal cells and basally located nuclei arc typical of the warm and awake squirrel. Fig. ."">. The acinar part of the submaxillary gland of the Arctic ground squirrel stained with hematoxylin and eosin. The small, disorganized acini with centrally placed nuclei and non-granular cytoplasm are characteristic of the ground squirrel in hibernation for three months. Fig. 6. Pancreatic, acini of the Arctic ground squirrel stained with Gomori's aldehyde fuchsin. Finely granular cytoplasm is characteristic of the non- hibernating Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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