All of his being is an accumulation of his plasm and the activities of his body. He sprang from the matter of the earth as it was energied by the nearby star that he sees through the sparse places in the glade. The bamboos about the panda are air creatures. They draw nitrates, some material substance, and water from the earth through the pores of their searching motile root tips. But much of the substance of the bamboo is drawn from thin air, from the gasses of the atmosphere, which are changed by a chemical cycle and the sun's rays into solid substance.
Gasses become the BODY of the panda via the bamboo.
The bamboos are threads that reach from the planet toward the star that energies them. They are quarreling about the payment on a car, or about the loss of a laundry ticket. The argument becomes too intensive for so minor an issue. It appears that the man and woman are enacting a rite. It might be two snow leopards, two bison, two wolves.