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chapter 12
Respiratory System
| Question | Answer |
|---|---|
| respiratory | Body system that includes the lungs and airways and performs breathing; the body’s system for breathing. |
| external respiration | Exchange of air between the body and the outside environment. |
| internal respiration | Exchange of oxygen and carbon dioxide between the cells. |
| lung | One of two organs of respiration (left lung and right lung) in the thoracic cavity, where oxygenation of blood takes place. |
| respiratory tract | Passageways through which air moves into and out of the lungs. |
| inspiration | Inhalation. |
| inhalation | breathing in |
| nose | External structure supported by nasal bones and containing nasal cavity. |
| nostrils | External openings at the base of the nose; also called external nares. |
| external nares | External openings at the base of the nose. |
| nasal septum | Cartilaginous division of the external nose. |
| nasal cavity | 1. Cavity on either side of the nasal septum. 2. Opening in the external nose where air enters the body. |
| cilia | Hairlike extensions of a cell’s surface that usually provide some protection by sweeping foreign particles away. |
| pharynx [ | Passageway at back of mouth for air and food; throat; tube through which food passes to the esophagus. |
| throat | Passageway at back of mouth for air and food; pharynx; tube through which food passes to the esophagus. |
| nasopharynx | Portion of the throat above the soft palate. |
| soft palate | Soft posterior part of the palate in the mouth; flexible muscular sheet that separates the nasopharynx from the rest of the pharynx. |
| pharyngeal tonsils | Adenoids. |
| oropharynx | Back portion of the mouth, a division of the pharynx. |
| palatine tonsils | Lymphatic tissue that works as part of the immune system. Mounds of lymphatic tissue on either side of the pharynx. |
| larynx | Organ of voice production in the respiratory tract, between the pharynx and the trachea; voice box. |
| voice box | Organ of voice production in the respiratory tract, between the pharynx and the trachea |
| trachea | Airway from the larynx into the bronchi; windpipe. |
| epiglottis | Cartilaginous flap that covers the larynx during swallowing to prevent food from entering the airway; movable flap of tissue that covers the trachea. |
| glottis | Part of the larynx consisting of the vocal folds of mucous membrane and muscle. |
| vocal cords | Strips of epithelial tissue that vibrate and play a major role in the production of sound. |
| thyroid cartilage | Supportive structure of the larynx; larger in males than in females. |
| Adam’s apple | Thyroid cartilage; supportive structure of the larynx; larger in males than in females. |
| Thyroid cartilage; supportive structure of the larynx; larger in males than in females. | Airway from the larynx into the bronchi; windpipe. |
| bronchi | the tubular branches into which the larynx divides |
| bronchus | One of the two airways from the trachea to the lungs. |
| mediastinum | Median portion of the thoracic cavity; septum between two areas of an organ or cavity. |
| septum | 1. Partition between the left and right chambers of the heart. 2. Cartilaginous division, as in the nose or mediastinum. |
| expiration | Breathing out; exhalation. |
| exhalation | Breathing out; expiration. |
| bronchiole | Fine subdivision of the bronchi made of smooth muscle and elastic fibers. |
| alveolus | Air sac at the end of each bronchiole. |
| alveolus | Air sac at the end of each bronchiole. |
| thorax | Part of the trunk between the neck and the abdomen; chest; chest cavity. |
| pleura | Double layer of membrane making up the outside of the lungs. |
| pleurae | Double layer of membrane making up the outside of the lungs. |
| parietal pleura | Outer layer of the pleura. |
| visceral pleura | Inner layer of the pleura. |
| pleural cavity | Space between the two pleura. |
| apex | Topmost section of the lung. |
| hilum | 1. Portion of the kidney where blood vessels and nerves enter and exit. 2. Midsection of the lung where the nerves and vessels enter and exit. |
| base | Bottom section of the lung. |
| superior lobe | Topmost lobe of each lung. |
| middle lobe | Middle section of the right lung. |
| inferior lobe | Bottom lobe of the lung. |
| diaphragm | 1. Muscle that divides the abdominal and thoracic cavities; membranous muscle between the abdominal and thoracic cavities that contracts and relaxes during the respiratory cycle. |
| diaphragm | 2. Contraceptive device that covers the cervix and blocks sperm from entering; used in conjunction with spermicide. |
| intercostal muscles | Muscles between the ribs. |
| eupnea | Normal breathing. |
| apnea | Cessation of breathing. |
| tachypnea | Abnormally fast breathing. |
| hyperpnea | Abnormally deep breathing. |
| orthopnea | Difficulty in breathing, especially while lying down. |
| bradypnea | Abnormally slow breathing. |
| dyspnea | Difficult breathing. |
| Cheyne-Stokes respiration | regular breathing pattern with a period of apnea followed by deep, labored breathing that becomes shallow, then apneic. |
| crackles | Popping sounds heard in lung collapse or other conditions; rales. |
| rales | Popping sounds heard in lung collapse or other conditions; crackles. |
| wheezes | Whistling sounds heard on inspiration in certain breathing disorders, especially asthma; ronchi. |
| rhonchi | Whistling sounds heard on inspiration in certain breathing disorders, especially asthma; wheezes. |
| stridor | High-pitched crowing sound heard in certain respiratory conditions. |
| dysphonia | Hoarseness usually caused by laryngitis. |
| hyperventilation | Abnormally fast breathing in and out, often associated with anxiety. |
| hypoventilation | Abnormally low movement of air in and out of the lungs. |
| hypercapnia | Excessive buildup of carbon dioxide in lungs, usually associated with hypoventilation. |
| hypoxemia | Deficient amount of oxygen in the blood. |
| hypoxia | Deficient amount of oxygen in tissue. |