Striped Muscle Fibers of a Frog
Two striped muscle fibers of the hyoglossus of frog. Labels: a, Nerve end plate; b, nerve fibers leaving the end plate; c, nerve fibers, terminating after diving into branches d, a nucleus in which two nerve fibers anastomose.
Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 95