Pierre Vinken, who authored The Shape of the Heart, wrote that anatomists illustrating Aristotle’s mistaken notion of what a human heart looked like might have contributed to the shape.

This Squishy 3D-Printed Human Heart Feels Like the Real Thing. ... Because the device works by depositing layers of material one on top of another, they run the 3D image through a slicer program.

Researchers in Britain and France used a new X-ray technique to capture the anatomical structure of the heart down to 20 micrometres - half the width of a human hair.

The human heart changed and adapted, along with the thermoregulatory and musculoskeletal system, to facilitate extended endurance activity, rather than sudden bursts of intense exertion. Image ...