Rudolf Heidenhain

Rudolf Heidenhain taken in 1890

Rudolf Peter Heinrich Heidenhain (German: [ˈhaɪdn̩haɪn]; 29 January 1834 – 13 October 1897) was a German physiologist born in Marienwerder, Province of Prussia (now Kwidzyn, Poland). His son, Martin Heidenhain, was a highly regarded anatomist.