Primary function of respiratory system is_______A. Gas exchangeB. Intake of oxygenC. Expulsion of carbon dioxideD. Expulsion of nitrogen 0 0 votesArticle Rating Subscribe LoginNotify of new follow-up commentsnew replies to my comments Label {} [+] Name* Email* Label {} [+] Name* Email* 0 Comments Oldest Newest Most Voted Inline FeedbacksView all comments
