Figure 3-21. Phase-contrast Micrograph of Living Cell from Culture of 

 Human Cystic Adenocarcinoma. The endoplasmic reticulum fills the greater 

 part of the cytoplasm of the cell. It exhibits a multiplicity of forms with 

 erratic bends or curves, of varying lengths, and often in equally spaced par- 

 allel array. The larger, more dense elongated forms are the mitochondria. A 

 Golgi complex is visible adjacent to the nucleus in the upper part of the 

 cell. (From Rose, G. G. and Pomerat, C. M., 1960. "Phase Contrast Obser- 

 vations of the Endoplasmic Reticulum in Living Tissue Cultures," J. Biophys. 

 Biochem. CytoL, 8, Fig. 3, p. 425. Courtesy of Dr. George G. Rose, Her- 

 mann Hospital, Houston, Texas.) 



50 / CHAPTER 3 



