how can man's lifestyle affect the functioning of the respiratory and circulatory system

MY ANSWER/ MY OPINION: the functioning of our respiratory and circulatory system is very important because it keeps our blood flowing which also activates or revives our organs, but we still need to take care of our body by eating nutritious food to make our body stronger, if we do not take good care of our body it can cause a disease in our organs and if we neglect it, it can weaken our organs and stop the flow of our blood which can cause our death​