-two short branches located at the lower

end of the trachea that carry air into the

lungs.

- a small branch of a bronchus

- bottom lobe of the lung

voice box; passageway for air moving from

pharynx to trachea; contains vocal cords

-Separated from superior lobe by horizontal

fissure, and lower lobe by oblique fissure:

receives secondary bronchus

- Either of the two external openings of the

nose.

The part of the mouth behind the gums and

teeth that is bounded above by the hard and

soft palates and below by the tongue and by

the mucous membrane connecting it with

the inner part of the mandible.

- The cavity on either side of the nasal

septum, extending from the nares to the

pharynx, and lying between the floor of the

cranium and the roof of the mouth.

- Any of the paired sinuses in the bones of

the face adjacent to the nasal cavity that are

lined with mucous membrane that

continuous with the lining of the nasal

cavities.

- The tube or cavity, with its surrounding

membrane and muscles, that connects the

mouth and nasal passages with the

esophagus.

- The tube in humans breathing and other

breathing vertebrates extending from the

larynx to the bronchi, serving as the principal

passage for conveying air to and from the

lungs; the windpipe

-a thin, valvelike, cartilaginous structure that

covers the glottis during swallowing,

preventing the entrance of food and drink

into the larynx.