Which of the following structures is not part of the conducting zone of the respiratory system?

Which value below is not needed to calculate alveolar ventilation rate?

Name the structure marked “C”.

Which answer properly describes the relationship between the quantities in 1 and 2?  The number of foreign particles within the air hitting the trachea.    2.  The number of foreign particles in the air hitting a bronchiole.

Which arrow is pointing to the ileocecal sphincter?  

The nasal conchae:

Name the structure marked “C”.

The nasal conchae:

Name the space marked “A”.

Name the layer marked “D”.