Heart shapes can be found in nature, if you’re lucky enough to see one. There’s a heart on this elephant’s trunk, a ridge of skin that feels like fine shoe leather. One of his wrinkles pierces the lower third of this heart shape, from left to right, straight as an arrow. His real heart hangs between his breastbone and ribs, a little to the left, just like mine does. But instead of having a heart with a single point, an elephant’s heart has two points at its apex – so it’s the wrinkled outline of a human heart that he carries on his trunk.
The human heart is approximately five inches long, three-and-a-half inches wide and shaped like a pulsing cone. It is the only muscle in my body that acts on its own – my heartbeat doesn’t need any messages from my brain. The cells in my heart tissue involuntarily constrict, all together, all at once, over and over, a soft perpetual-motion machine. Rip my heart from my body, chop it into pieces, immerse the pieces in a saline solution, and then give them a small jolt of electricity. The remnants of my cardiac muscle will contract . . . contract . . . contract – all on their own, sometimes for hours.
It’s designed to be strong, our hearts.