Excretion is a function of the body. Which would be considered excretion?
◦ Movement of oxygen from the lungs to the blood stream.
◦ Movement of salt from sweat glands to the surface of the skin.
◦ Movement of potassium from kidney cells into one's urine
◦ Movement of sodium from the intestines to the bloodstream.
◦ Movement of glucose from the kidney to the bloodstream.