Which part of the body transports molecules from food and air to the cells of the body

Molecules from food and molecules of oxygen move from the mouth and the nose to cells of the body through a series of blood vessels, including veins, arteries, and microscopically small blood vessels (capillaries), that extend throughout the body.

Explanation: This is right

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it