Cardiac Muscle Structure
(Media Collection)
Background Info
There are two major types of cardiac muscle cells: myocardial contractile cells and myocardial conducting cells. Myocardial contractile cells constitute the bulk (99%) of the cells in the atria and ventricles. They conduct impulses and are responsible for the contractions of the heart.
General Structure of Contractile Cells
(Illustration)
Labeled and Unlabeled Versions
(1125px X 1600px)
Ultrastructure of Contractile Cells
(Illustration)
Labeled and Unlabeled Versions
(1125px X 1600px)
Intercalated Disc
(Interactive)
Intercellular Junctions
(Interactive)