. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. VESICULATED AXONS IN CUCUMARIA 333 body and axons. No similar vesicles have been found in coelomic epithelial cells, and in hundreds of sections containing muscle cells we have found only a few similar granules in muscle cell cytoplasm. Sections of cell processes distant from the cell body have been found containing much more uniform populations of a hundred or more dense-cored vesicles. Dilations of the axons in the nerve strands also show accumulations of several vesicles and a few mitochondria and lipid granules. Axons le
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. VESICULATED AXONS IN CUCUMARIA 333 body and axons. No similar vesicles have been found in coelomic epithelial cells, and in hundreds of sections containing muscle cells we have found only a few similar granules in muscle cell cytoplasm. Sections of cell processes distant from the cell body have been found containing much more uniform populations of a hundred or more dense-cored vesicles. Dilations of the axons in the nerve strands also show accumulations of several vesicles and a few mitochondria and lipid granules. Axons leaving the nerve strand are often about micron in diameter and taper gradually to to micron at their terminations at the muscle cells. Single dense vesicles may fill the cross-section of the axon termination. At the muscle cell surface the axons terminate as slightly flattened processes with a distinct intercellular space between the membranes of muscle and nerve / '" k FIGURE 5. Portion of a cell body with a tangential section of the Golgi region surrounded by vesicles of a variety of sizes including some multivesiculate forms. The internal vesicles are of differing densities and degrees of aggregation. Glutaraldehyde fixation, 16,000 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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