| A | B |
| alveolus | an air sac of a lung |
| carbaminogemoglobin | the compound formed by the union of carbon dioxide and hemoglovbin |
| cellular respiration | the process by which energy is released from organic compounds within cells |
| glottis | a slitlike openeing between the true vocal folds |
| hyperventilation | Breathing taht is abnormally deep and prolonged |
| oryhemoglobin | the compound formed when oxygen combines with hemoglobin |
| pleural cavity | the potential space between the plural membranes |
| respiratory membrane | the membrane composed of a capillary wall and an alveolar wall through which gases are exchanged between the blood and air |
| surface tension | the force that tends to hold moist membranes together |
| bronchial tree | the bronchi and their cranches that function to carry air from the trachea to the alveoli of the lungs |
| carbonic anhychase | an enzyme that promotes the reaction between carbon dioxide and water to form carboinic acid |
| expiration | the process of expelling air from the lungs |
| hemoglobin | a pigment of red blood cells responsible for the transport of oxygen |
| inspiration | the act of breathing in |
| partial pressure | the pressure produced by one gas in a mixture of gases |
| respiratory center | the portion of the brain stem that controls the depth and rate of breathing |
| respiratour volume | the level of pressure it exceeds |
| surfactant | a substance produced by the lungs, that reduces the surface tension within the alveoli |