Demonstration of muscle sphincters as a capillary component in the human heart.
نویسندگان
چکیده
The capillary network in the ventricular myocardium in man consists of 2 sphincter-type capillaries (the metarteriole and the precapillary) and a nonmuscular capillary, the classic or true capillary. The muscular components of the metarterioles and of the precapillaries are innervated by nerve fibers of which the terminal structure ends as a knotted fibrillar process near the muscle nucleus. The sphincter capillary and its nerve constitute a functional unit. These structures are encountered in the myocardium of
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A study of the capillary structure in the myocardium of the dog reveals three divergent types which can be distinguished on the basis of the presence or absence of sphincter muscle cells located in a position comparable to that occupied by the media of the larger vessels. The true capillary is completely wanting in muscular elements; the precapillary contains one or more muscle cells at the seg...
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عنوان ژورنال:
- Circulation
دوره 20 1 شماره
صفحات -
تاریخ انتشار 1959