He showed that yeast were
He showed that yeast were tiny organisms, and in 1836 he discovered and prepared the first known animal enzyme, pepsin. His namesake cells are a variety of neuroglia whose outer layers form the neurolemma. In the peripheral nervous system his namesake cells allow saltation conduction by wrapping around axons, with the inner layers forming myelin sheaths. FTP name this man who posited the cell theory with Schleiden.
He showed that yeast were tiny organisms, and in 1836 he discovered and prepared the first known animal enzyme, pepsin.
Theodore {Schwann}