["Circular bands" on the casts of the microcirculatory bed of the human heart in ontogenesis (data from scanning electron microscopy of corrosive casts)].

By means of scanning electron microscopy of corrosive casts, applied to the human cardiac hemomicrocirculatory bed vessels, beginning from 6-9-month-old fetuses up to persons of elderly and old age, peculiarities in form, dimensions and distribution have been revealed in the wall of the arterial part of the vessels of the hemomicrocirculatory bed of so called circular strips. They are inevitable structural components in the wall of the vessels mentioned and correspond to smooth myocytes, shifted at methylmetacrilate injection.