How the digestive, cardiovascular and respiratory system are interrelated

Digestive system breaks down large molecules into simple molecules such as glucose. these are then transported to cells of the body via the circulatory system. the respiratory system causes the diffusion of oxygen into the blood in the diffusion of co2 out of the blood.

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons