Are there any parts of the human body that get oxygen directly from the air and not from the blood?

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

a covalent bond, specfically triple bond

cell division is not regulated in tumor cells.

answer; coat color for blending in with dry grass;