cardiac muscle tissue

tissue muscle cardiac heart organ cardio wall anatomy muscular vector cell human system body structure type fiber contraction branch histology hypotonia myocarditis hypertrophic cardiomyopathy purkinje uninucleated epicardium pericardial pericardium myocardium bundle biology cartilage diagram illustration medical tendon function graphic health density physiology myofibrils pattern involuntary microscope cellular education infographic isolated