What is the primary function of the upper respiratory system? to move air toward the lungs while warming, moistening, and filtering it to diffuse oxygen and carbon dioxide in and out of cells to absorb and break down nutrients after they are consumed to pad the head with air pockets to protect against brain trauma

the answer would be roots! roots are the parts of the plant that are underground, and that's how they'd anchor the plant. the stem is above the sol, which doesn't with anchoring. hope this !

,identify or describe the affordable care act. how has aca changed healthcare in the us since implementation? you may professionally express your opinion on aca, do you think it will or hurt patient care?