This view shows muscle fibers running parallel with each other. 

This view shows cross section of each muscle fiber.  

In this image, the supporting collagenous tissue is stained blue, holding fasciculi of smooth muscle cells together. 

Example of smooth muscle layers running in different directions of tubular structure. L = longitudinal outer muscle layer, C = inner smooth muscle circular layer, G = parasympathetic ganglia. 

Longitudinal section.

Transverse section. C = capillary.

C1-6 = cardiac muscle cells, D = intercalated disc, Cap = capillary

FA = fascia adherens, D = desmosomes, N = gap junctions, M = mitochondria, G = glycogen granules, SR = sarcoplasmic reticulum, T = T-tubules.