In cardiac muscle, mitochondria are distributed uniformly in a near-continuous field of myofilaments, ensuring that ATP is readily available. This transverse section is of right ventricular papillary...

Figure 351 from Chapter 15 (Cytoplasmic Inclusions) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Glycogen in the ventricle papillary muscle of cat heart. In this tissue, the glycogen occurs as indi...

Transmission electron micrograph of rat heart cardiac muscle from the atrium showing the regular arrangement of the actin-myosin myofilaments in cross section and abundant mitochondria. This 1958 TE...

Transmission electron micrograph of longitudinal section of rat cardiac muscle from the atrium. A of group of horizontally-running myofibrils is seen at the top. Also prominent are numerous glycogen...

Transmission electron micrograph of mouse cardiac muscle in the ventricle. A white blood cell is visible inside a blood vessel.

Transmission electron micrograph of mouse atrial cardiac muscle showing a close up image of the intercalated discs, which support synchronized contraction of the cardiac muscle.

Transmission electron micrograph of mouse cardiac muscle (ventricle). The image illustrates the myofibrils as well as a sarcomere in the area of fibrils between the two Z-lines. Z-lines link actin fi...

Transmission electron micrograph showing adjacent muscle fibers from the ventricle of a mouse cardiac muscle. This image shows the organization of muscle tissue, nucleus, cell walls and blood vessels...

A 3D reconstruction of the cardiac outflow tract (OFT) region (horizontal and vertical rotation) from stage-14 wild-type embryo stained for Tinman (Tin; red) and Msp300 (green). Tin staining reveals t...

Transmission electron micrograph of four longitudinally cut ventricle muscle fibers of mouse cardiac tissue. Muscle fibers are multinucleate celsl composed of myofibrils that contract when stimulated...