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Respiratory System
The Respiratory System
| Term | Definition |
|---|---|
| Respiratory System consists of | nose (nasal cavity), pharynx, larynx, bronchi, bronchioles, alveoli, lungs |
| Purpose of the Respiratory System | furnish oxygen to the body's cells and to remove carbon dioxide |
| External Respiration | air is brought into the lungs and oxygen and carbon dioxide are exchanged in the blood within the capillaries surrounding the alveoli. |
| Internal Respiration | oxygen and carbon dioxide move between the blood and the body's cells |
| Cilia | small hairs that line the nose |
| pharynx | throat |
| 3 divisions of the pharynx | nasopharynx, oropharynx, and laryngopharynx |
| nasopharynx | posterior to the nasal cavity |
| oropharynx | middle portion located behind the mouth |
| laryngopharynx | lower portion behind the larynx |
| 3 pairs of lymphoid tissues (tonsils) | adenoids (aka pharyngeal tonsils), palatine tonsils, lingual tonsils |
| location of pharyngeal tonsils | nasopharynx |
| palatine tonsils | oropharynx |
| lingual tonsils | base of the posterior portion of the tongue |
| larynx (voice box) | a cartilaginous structure located between the pharynx and trachea |
| glottis | space between the vocal cords; closes during swallowing to keep food out of the respiratory tract |
| epiglottis | leaf-shaped cartilage located above the glottis; plaplike structure that covers the larynx to prevent swallowed food from entering the trachea and lungs |
| trachea (windpipe) | a cartilaginous tube that extends from the pharynx to the main bronchi |
| bronch/o, bronchi/o | bronchus |
| laryng/po | larynx |
| nas/o, rhin/o | nose |
| oxia | oxygen |
| or/o | mouth, opening |
| pharyng/o | pharynx |
| phonia | voice |
| phren/o | diaphragm |
| pleur/o | pleura |
| pnea | breathing |
| pneum/o, pneumon/o | air, lung |
| pulmon/o | lung |
| sinus/o | sinus cavity |
| thorac/o, thorac/i, thoracic/o | thorax, chest |
| trache/o | trachea |