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Shape and rhythmic changes of the heart of larval mahi during the early post-embryonic stages of 56, 80, and 104 h post-fertilization. (A) Morphology and general outline of cardiac chambers in left lateral view. (B) Heart chambers are outlined during end-diastole (solid line) and end-systole (dashed line). Note the relative changes in volume of the atrium and ventricle as development progresses. BA, Bulbous arteriosus; A, atrium; V, ventricle; SV, sinus venosus.
