From Brendan Myers' philosophical book Circles of Meaning, Labyrinths of Fear:
The relations of mind and body, so important to the good life, seem to suggest or to lead to the relations of the environment in which the body lives. For it is obvious that a body needs air, water, sunshine, food, space to move and grow, and so on.
Indeed, all of the body’s powers and functions exist in relation to its environment. In every moment the body takes in one mass of energy and matter, transforms it internally for its own purposes, and then discharges some of it back to the world again. That is what we do by eating, drinking, and breathing. There is no separating the body from these relations without stunting its growth, denying it the full development of its potentials, or putting it to death. It is perhaps less obvious, but no less significant, that many of the organic functions necessary for life take place outside the body itself: the purification of air and water in an ecosystem, for instance.
Thus there is no such thing as a body that is lacking in nothing for the completion of its existence, unless it is a corpse. Thus the relations of mind and body are carried beyond the body itself and into the lands, seas, skies, and elements of the world.