Answer:
The respiratory system is important because it provides the oxygenation of the whole body. And good nutrition affects it by supplying the cells of the respiratory system the glucose, proteins, water, and other compounds required to its correct functioning.
Step-by-step explanation:
The reason behind this answer is that we are talking about metabolism. Let's look at this as a whole, first, all the body has cells. All these cells require energy and other substances to work properly. Now, the only way we can provide them their required substances is by eating. Because this is our natural way to obtain nutrients. So, if the lung cells require glucose, oxygen, proteins, calcium, water, zinc, or any other elements. We can provide them the best substances with the best nutrition, so the system can work.