| Term | Definition |
|---|
| alveolus | an air sac of a lung |
| bronchial tree | the bronchi and their branches that carry air from the trachea to the alveoli of the lungs |
| carbaminohemoglobin | compound formed by the union of carbon dioxide and hemoglobin |
| cellular respiration | cellular process that releases energy from organic compounds |
| expiration | expulsion of air from the lungs |
| glottis | slitlike opening between the true vocal folds or vocal cords |
| hemoglobin | pigment of red blood cells that transports oxygen |
| hyperventilation | abnormally deep and prolonged breathing |
| inspiration | breathing in; inhalation |
| oxyhemoglobin | compound formed when oxygen combines with hemoglobin |
| partial pressure | the pressure one gas produces in a mixture of gases |
| pleural cavity | potential spaces between pleural membranes |
| respiratory capacities | value obtained by adding two or more respiratory volumes |
| respiratory center | portion of the brain stem that controls breathing depth and rate |
| respiratory membrane | membrane composed of a capillary wall and an alveolar wall through which blood and inspired air exchange gases |
| surfactant | substance produced by the lungs that reduces the surface tension within the alveoli |
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