There are many nutrients that affect the immune system. Therefore, a balanced diet is probably the most important consideration in maintaining a healthy immune system. Many vitamins and herbs can help the immune system function more effectively. By supplying oxygen, our respiratory system enables us to produce energy. The lungs are also responsible for releasing carbon dioxide, a by-product of cell metabolism, from the body.
Carbon dioxide is necessary for plant respiration.
Plants take in carbbon dioxide and release oxygen, their waste product, and the cycle of mutual benefits between plant and humans is repeated continuously. Since oxygen is so vital to the energy needs of the human body, it is essential that we maintain healthy lungs by breathing unpolluted air as much as possible and by supplying the body in general with good nutrition. These all work together in monitoring the body's various functions, continuously making adjustments as needed. The hypothalamus, located in the brain in close association with the pituitary gland, is the link between the endocrine and nervous systems. The glands produce and excrete chemical substances into the blood known as hormones.