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Respiratory Sys
Chapter 17 definitions
| Term | Definition |
|---|---|
| Alveolus | Air sacs in the lungs |
| Bronchi | The 2 main branches leading from the trachea to the lungs that serve as passageways for air |
| Bronchioles | One of the smaller subdivisions of the bronchial tubes |
| Epiglottis | The uppermost cartilage of the layrnx; closes during swallowing to direct food and liquids into the esophagus |
| Glottis | The opening between the vocal cords |
| Hilum | Opening on the lung's medial surface through which primary bronchi and pulmonary blood vessels pass |
| Intrapleural pressure | The pressure between the visceral and parietal pleurae, which assists with lung expansion |
| Larynx | Structure made of cartilage and muscle at the upper end of the trachea; part of the airway and the vocal apparatus |
| Palate | Bony structure separating the mouth from the nasal cavity |
| Partial pressure | The contribution of a single gas in a mixture of gases toward the total pressure of the gas mixture |
| Pharynx | Muscular tube behind the oral and nasal cavities; commonly called the throat |
| Pleura | Serous membrane covering the lungs and the thoracic cavity |
| Surfactant | Lipoprotein secreted by alveolar cells that decreases surface tension of the fluid lining the alveoli, permitting expansion of alveoli |
| Tidal volume | The amount of air inhaled and exhaled during quiet breathing |
| Trachea | Portion of the respiratory tract that carries air through the neck and upper chest |
| Ventilation | The movement of air into and out of the lungs |
| Vital capacity | The amount of air that can be inhaled and exhaled with the deepest possible breath |
| Carina | Cartilaginous ridge at the base of the trachea, where the 2 primary bronchi branch |
| Conchae | 3 bones projecting from the lateral wall of each nasal cavity |
| Thyroid cartilage | Largest piece of cartilage in the larynx; Adam's apple |
| Apneustic center | Stimulates the inspiratory center to increase the length and depth of inspiration |
| Pneumotaxic center | Inhibits both the apneustic center and the inspiratory center; contributes to a normal breathing rhythm and prevents overinflation of the lungs |
| Pneumothorax | Collapsed lung |
| Inspiratory reserve volume | The amount of air inhaled using maximum effort after a normal inspiration |
| Expiratory reserve volume | The amount of air that can be exhaled after a normal expiration by using maximum effort |
| Residual volume | The amount of air remaining in the lungs even after forced expiration |
Created by:
cbooher16
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