Test question please help!?

Question

It's for the science test review. I don't get it. 1. which muscle contracts to pull air into the lungs?2.Name the major structures of the human respiratory system. 3.Describe the path of oxygen from outside the body to the alveoli.4. How does oxyget in the alveoli get into the blood? 5.Describbe the structure of the lung.6. What is the function of hairs and mucus in the respiratory passages? 7.What leaves the body with each exhaled breath? (is it carbon dioxide?) Answer as much as you can. Thanks!

Answer 1

I won't answer them for you; but since I'm doing my college course in science, I can point you in the general direction of what will answer most of the questions you have.

yucky.discovery.com/flash/body/pg00013...