Cardiac muscle cell

Branching muscle cell

Connective tissue

Connective Tissue (zoom)

Intercalated disks-

Mitochondrion

Mitochondrion

myofibrils

Myofibrils

Myofibrils

Nucleus of cardiac muscle cell

Nucleus of cardiac muscle cell

Sarcolemma (plasma membrane)

sarcolemma (plasma membrane) (zoomed in)

Sarcomere

Sarcomere

Sarcoplasmic reticulum

Sarcoplasmic reticulum (zoomed in)

T tubes

T tubule