Smooth muscles in the walls of the intestines and internal organs. Long, spherical cells appear round or polygonal in cross sections

Smooth muscles:
It is found in the walls of the gut intestine and internal organs, so called Visceral muscle. And the contraction of these muscles is not under the control of the will of the individual so called involuntary Involuntary.
The smooth muscles consist of long, spherical cells that appear round or ribbed in cross sections, each cell containing an oval or rodent central nucleus located within the Sarcoplasm muscle cytoplasm.
Muscle fibers occur almost regularly as the expandable middle part of the one loaf is shown adjacent to the final splicing parts of the other adjacent fibers, and each fiber consists of the non-planally formed Myofibers.
In some cross sections, some fibers contain a nucleus and other fibers do not. Some of the fibers show a large diameter and the other is small and medium. This depends on the position of the cut. If the pieces pass through the expander (containing the nucleus), the fiber will be large in diameter and contain a nucleus. If the pieces pass through the spindle ends, the nuclei do not appear and the fiber in the cross section is small.
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