According to Baidu Encyclopedia, Johannes Peter Muller is a German physiologist, comparative anatomist, ichthyologist and reptilian. Mill has made many contributions in the field of physiology, especially improving people's understanding of sound, language and hearing, as well as the chemical and physical properties of lymph, emulsified fat and blood.

His Principles of Physiology summarized people's knowledge about physiology at that time, and became the dominant physiology textbook in almost the whole19th century. He also established the world's first Institute of Physiology at the University of Berlin. He is considered as one of the outstanding representatives of physiology in the19th century.