Smooth muscle is constituted by a long and narrow fusiform muscle cells, the cell does not have stripes , so called smooth muscle . More irregular arrangement of smooth muscle in on the tip of each cell overlapping to form a cord-like , bundle or layer . Often the presence and distribution in the visceral and parietal , and also known as visceral muscle . Smooth muscle is involuntary muscle contraction of the longer reaction time can be prolonged contraction. By the autonomic nervous system and endocrine regulation, can change the frequency and intensity of contraction . In the absence of nerve stimulation , smooth muscle cells can also produce intermittent action potential , causing spontaneous contraction . Mounted on board Size: 23.5 x 26 x 18.5cm Weight approx. 1500g