Heart chamber anatomy. Labelled animation showing the anatomy of the heart and its internal chambers. The animation starts with a view of a human figure showing the skeleton and internal organs. The view zooms in on the beating heart and the lungs, which are rising and falling with each breath. The animation then shows just the heart in frontal and then sectioned view. The sectioned view shows the heart's internal chambers, the right and left ventricle and the right and left atrium. The animation also shows other internal heart structures, such as the pericardium, the papillary muscle, the septum, and the tendinous chords (heart strings). This is an alpha channel animation. Unlabelled version: K005/6426. Black background versions: K005/6433 and K005/6429.