The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
True, they have collected data from people with and without the flu virus
The answer is a eating disorder. Reason is because b,d and c are all physical disorders in which your mind has no control over. However eating disorders are usually caused by a form of stress or worry about somthing in your head that causes you to not want to eat
