_________________using Halon 1211 can be activated automatically or manually

Which of the following is NOT a key criterion when abstracting conditions of the ear and mastoid process?

a. What other conditions coexist? b. Is there an underlying disease? c. Is the condition genetic? d. Is there documentation of current or past use of tobacco or exposure to tobacco smoke?

Air enters the nares and immediately passes along the ____________________.

Fill in the blank(s) with the appropriate word(s).