EUGENE M. LANDIS, F.A.C.P.
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When William Harvey first described the circulation of the blood over 300 years ago his observations were necessarily limited to the grossly visible portions of the circulatory system,—to the heart, arteries and veins. His evidence for a completely closed circulation, even on this basis, was so conclusive that the capillary portion of that circulation could be taken practically for granted. It was, in fact, 50 years before the capillaries themselves were observed under the microscope.
It seems as if investigation of capillary physiology has never been able quite to overcome this initial handicap of half a century. The heart and
LANDIS EM. VASCULAR PHYSIOLOGY AND CLINICAL MEDICINE1. Ann Intern Med. ;10:290–298. doi: 10.7326/0003-4819-10-3-290
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Published: Ann Intern Med. 1936;10(3):290-298.
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