The primary function of the respiratory system is to supply the blood with oxygen so that the blood can deliver oxygen to all parts of the body.
The correct answer is the respiratory system. The respiratory system is responsible for supplying oxygen to the blood and removing carbon dioxide, a waste product, from the body. It consists of organs such as the nose, throat, trachea, bronchial tubes, and lungs. The process of respiration occurs in the lungs, where oxygen from the inhaled air is transferred into the bloodstream and carbon dioxide is eliminated through exhalation. Thus, the respiratory system ensures that the blood is oxygenated and can deliver oxygen to all parts of the body.
