We all live in the ocean of air, called the atmosphere, and extending the ocean concept some, we're just a bunch of bottom feeders. Air and water move around without breaking apart, because they are fluids.
Water fills the oceans of the world up to sea-level making it a liquid, a type of fluid.
Liquids, to put it simply, are fluids with a top. Air isn't a liquid, it's a gas, another kind of fluid, and as a result, the atmosphere is far less enslaved by gravity than is the more dense liquid ocean. The atmosphere just kind of thins out into nothing, a few hundred miles above our heads. There is no atmosphere level like there is a sea level, a key difference in these two fluid oceans. Both make oceans, with currents and waves, and together move people around the planet.