ultrastructure of the camel atrial myocytes

ABSTRACT

The ultrastructure of the cells specialized for contraction in the right and left atrial of adult camels were studied. The atrialmyocytes are small in diameter and have strikingly moderate number of transverse [T] tubules. Coated dense vesicles found associated with the sarcoplasmic reticulum at the level of the Z line are evident in atrialmyocytes. In the virtual presence of T tubules in atrial myocytes, the sarcolemmal cisternae of the sarcoplasmic reticulum are almost exclusively at the periphery. The interdigitated portions of the intercalated discs oriented oblique to the myofilament axis