We humans think we are special, and we are, but we are not quite unique. We have many similarities to many other inhabitants of our biosphere. We have hearts and lungs and brains. Even fish have the same organs except notably, they breathe through gills that enable them to extract oxygen to fuel the rest of their machinery.
One weekend a few years ago, a friend needed some brush cut behind his house and I had a gas-powered weedwacker that needed exercise. I three-bladed through two-inch vines like a scythe through a hay field, working up a sweat scattering poison ivy chips all over that part of York County.