. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. 618 Comparative Animal Physiology huge branches from the tenth cranial nerve arise in large lobes of the medulla. The electroplaxes are derived embryologically from electroblasts similar to sarcoblast precursors of muscle.**-^ The elongate multinucleate cell enlarges laterally, nuclei increase around the cell periphery, and the center becomes filled with mucous protein (Fig. 235). One surface is innervated, usually the electronegative surface, and the other is frequently papilliform. The single electroplax resem
. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. 618 Comparative Animal Physiology huge branches from the tenth cranial nerve arise in large lobes of the medulla. The electroplaxes are derived embryologically from electroblasts similar to sarcoblast precursors of muscle.**-^ The elongate multinucleate cell enlarges laterally, nuclei increase around the cell periphery, and the center becomes filled with mucous protein (Fig. 235). One surface is innervated, usually the electronegative surface, and the other is frequently papilliform. The single electroplax resembles a motor end-plate (Fig. 236)^^. When an electric fish discharges, each organ fires repetitively, usually 3 to 5 spikes, sometimes many more. Each spike is of constant height and Papillae Nerve Electric layer. Connective tissue Fig. 235. Diagram of two electroplaxes. Nerve elements in black, electric layer granular and nucleated. From Ihle, Kampen, et al.^"' '*" ''~)^^^°::T^^^i Muscle striation Telogiia. 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 Prosser, C. Ladd (Clifford Ladd), 1907-; Bishop, David W. Philadelphia, Saunders
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