Cell walls relax and increase the flow of what?
heat sugar saliva blood oxygen Air semen water
A B C D E F G H
Blood vessels dilate, the flow of blood to the skin increases and the muscles relax.
Cell walls relax and increase the flow of blood
Cell walls relax and increase the flow of what? (A) heat (B) sugar (C) saliva (D) blood (E) oxygen (F) Air (G) semen (H) water