. Cytology. Cytology. periphery of the cell. The rough-surfaced elements are elongate and arranged more or less parallel to one another. These parallel arrays are interpreted as flattened vesicles of irregular outline and have been termed. SSi Figure 3-23. Electron Micrograph of Basal Portion of Exocrine (acinar) Ceil of Guinea Pig Pancreas. The endoplasmic reticulum consists of parallel rows of vesicles bounded by rough-surfaced membranes and arranged con- centric with the nucleus. Branching of the rows (b) and anastomoses be- tween adjacent rows (a) is shown. Elongated profiles (e) predomina
. Cytology. Cytology. periphery of the cell. The rough-surfaced elements are elongate and arranged more or less parallel to one another. These parallel arrays are interpreted as flattened vesicles of irregular outline and have been termed. SSi Figure 3-23. Electron Micrograph of Basal Portion of Exocrine (acinar) Ceil of Guinea Pig Pancreas. The endoplasmic reticulum consists of parallel rows of vesicles bounded by rough-surfaced membranes and arranged con- centric with the nucleus. Branching of the rows (b) and anastomoses be- tween adjacent rows (a) is shown. Elongated profiles (e) predominate; how- ever, circular (c) and oval (o) profiles are also present in many of the rows. Profiles of the rough-surfaced variety are seen in oblique section (ob) in the upper left corner of the figure. Smooth-surfaced membrane elements (ss^ SS2) are rare in this type of cell and, when present, often occur in small clusters (ssj). The nucleus appears at n and two mitochondria at m. (From Palade, G. E., 1956. "The Endoplasmic Reticulum," J. Biophys. Biochem. CytoL, 2, Suppl., Fig. 4, Plate 34.) dsternae by Porter and coworkers (Figure 3-25). The cisternae, to- gether with their associated granules, apparently coincide with the baso- philic regions of the cytoplasm and on this basis would correspond to the chromidial substance or ergastoplasm of gland cells first described by Gamier in 1899 (Porter, 1957). 52 / CHAPTER 3. 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 Wilson, G. B. (George Bernard), 1914-; Morrison, John H. (John Herbert), 1927-. New York, Reinhold
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