in the nonnucleated part of the muscle cells , sphincter muscle had a greater ratio of mitochondrial profile area to cell profile area ( p less than 0.05 ) , mitochondrial profiles in sphincter muscle were more central in location than in esophageal body muscle ( p less than 0.05 ) , and sphincter muscle contained more endoplasmic reticulum than body muscle ( p less than 0.05 ) .
C0007634
cell
C0026237
mitochondrial