Ultrastructure Observation of Cardiac Muscle Cells of Guizhou Miniature Pig

Objective To observe the ultrastructure of cardiac muscle in Guizhou mini-pig.Methods The observation was obtained by transmission electron microscope. Results Cardiac muscle cells of Guizhou miniature pig exhibited regularly,a cross-striated banding pattern distinguishing Z line,I band,A band,H band and M line.It was obvious that numerous mitochondria around myofilaments and the sarcoplasmic reticulum were pretty well developed and wanders irregularly through the myofilaments,with little transverse tubules existing and possessing only one T tubule at the Z line.At the level of the Z lines between adjacent cardiac muscle cells,the intercalated disk composed of 3 main junctional specializations complexes.Conclusion Though possessing its different characteristic,cardiac muscle cells of Guizhou miniature pig exhibit the same ultrastructures of human being.