12. B,C

uppermost part

The apical part of the lung

oxygen

The gas that passes into the bloodstream at the lungs

inspiration (inhalation)

Breathing in air

lobes

Divisions of the lungs

carbon dioxide

The gas produced by cells and exhaled through the lungs

pleural cavity

The space between the visceral and the parietal pleura

expiration (exhalation)

Breathing out air

parenchyma

The term that describes the essential parts of the lung (bronchiole and alveoli), responsible for respiration

external respiration

The exchange of gases in the lung

internal respiration

The exchange of gases at the tissue cells

bronchiectasis

chronic dilation of a bronchus

pleuritis

inflammation of pleura

pneumothorax

air in the chest (pleural cavity)

anosmia

lack of sense of smell

laryngectomy

removal of the voice box

nasopharyngitis

inflammation of the nose and throat

phrenic

pertaining to the diaphragm

alveolar

pertaining to an air sac

glottis

opening to the larynx

tracheal stenosis

narrowing of the windpipe