Tag: Theodor Schwann.
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The beginnings of cell theory: Schleiden, Schwann, and Virchow
JMS PearceHull, England Every schoolchild is taught in biology about cells and their elemental importance. Students of biological and medical sciences also learn about the Schwann cell sheath that invests nerve fibers. What is less well known is how these two are related. Schwann, a physician by training, and Schleiden, a botanist from Hamburg, were…
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William Withering’s botanical microscope
JMS PearceEast Yorks, Hull, England William Withering (1741-1799) (Fig 1) made several important contributions to medicine and science other than his well-known discovery of the medicinal value of the foxglove (Digitalis purpurea). Digitalis1 and diuretics were the lynchpins of treatment for edema and congestive heart failure until the 1990s. Withering found that if he used…