Air entering the body through the nose travels first through the ...

[yoroshambo]

Air entering the body through the nose travels first through the ________ and then through the ________ before entering the lungs.
 
  A) upper respiratory tract; lower respiratory tract B) upper respiratory tract; aorta
  C) lower respiratory tract; pulmonary artery D) alveoli; upper respiratory tract

Question 2

When stretching, you should hold each stretch for at least
 
  A) 10 seconds. B) 30 seconds. C) 1 minute. D) 5 seconds.

[ebonylittles]

Answer to Question 1

A

Answer to Question 2

A