Human heart (mitral valve) tissue displaying calcification

Human heart (aortic valve) tissue displaying calcification

Digitalis purpurea (Purple foxglove)

Cardiac muscle stained for mitochondria. Mitochondria provide the energy to power contraction of the muscle.

Digitalis lanata (Woolly foxglove)

Aortic valvular endocarditis, horse. This equine (horse) aorta has been dissected at the level of the valve, separating the artery from the left ventricle (bottom chamber). Nodules are present which have formed as a consequence of endocarditis. 

Human heart (aorta) tissue displaying calcification

Heart muscle cells

Adult sheep (ovine) heart

Arterial nodules, horse

Pulmonary artery cells

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