Karl Wilhelm Zimmermann (born 10 April 1861, Neunkirchen, Saarland; died 1935) was a German anatomist, pathologist and histologist, known for his eponymous contribution in the Zimmermann–Laband syndrome.
From 1894 to 1927 was an assistant in the anatomical institutes at Greifswald and Berlin, as well as prosector at Giessen and in Bern, Switzerland.
Erich Hintzsche, the Swiss physician and historian came under the anatomical influence of Zimmermann, who was his chief when he moved to Bern in 1928.
[3] He was the first person to name the 'pericyte,'[4] the macula densa cells of the renal tubules and also the 'basal body'[5] Although Alexander Onufrievich Kovalevsky in 1867[6] and Paul Langerhans[7] in 1876 had described flagellated cells and illustrated them, Zimmermann, using iron-haematoxylin stains, actually termed the central flagellum (Centralgeissel) in 1894, and again later in 1897.
He was the first to discover the presence of primary cilia in mammals(including human beings)[8] In 1898, he even speculated that “One could also imagine that this delicate flagellum, whose movement may have no significant impact upon the secretions that are found in the glandular lumen, may work as a kind of sensory organ, that is, changes in the configuration of the secretions flowing inside the glandular lumen might have a stimulating effect upon the flagellum, whereby the secretory function might be qualitatively or quantitatively affected”[9] thereby predicting their function as flow sensors a century before the experimental demonstration of it by Praetorius and Spring.