Which statements correctly describe the structures in the lower respiratory tract? Select all that apply.
a) The parietal pleura encases each lung.
b) The left main bronchus branches off the trachea.
c) The upper, middle, and lower lobes comprise the right lung.
d) The trachea conducts air between the pharynx and the lungs.
e) The alveoli are found at the terminal end of the main bronchi.
