The Circulatory System


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The Circulatory System
1011302The Circulatory SystemIn 1628, William Harvey, an English naturalist and natural philosopher, first stated that the blood circulates in a definite path throughout the body rather than merely surging back and forth. This seminal idea, which led to the development of physiology as a rigorous experimental science, could not be completely understood until the capillaries were discovered much later by Marcello Malpighi, an Italian anatomist. Since it is the blood that distributes materials throughout the body, it is readily apparent that circulation underlies all aspects of function within the organism.In all vertebrates and several groups of invertebrates (e.g., earthworms), the circulatory system is a completely closed system of tubes.…
Citation
George H. Fried; George J. Hademenos: Schaum's Outline of Biology, Fourth Edition. The Circulatory System, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export