Glencoe Health 2005.pdf

The larynx and the epiglottis other structures that

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The Larynx and the Epiglottis Other structures that are not directly involved in respiration but have important functions in the respiratory system are the larynx and the epiglottis. The , or voice box, connects the throat and the trachea. The larynx contains the vocal cords, two bands of tissue that produce sound when air forced between them causes them to vibrate. The epiglottis is a flap of cartilage located above the larynx. It folds down to close off the entrance to the larynx and trachea when you swallow, keeping food or drink from entering the respi- ratory system. If you eat too quickly or laugh while eating, food may go down the “wrong pipe.” The cough reflex is then stimu- lated in an attempt to expel the material from the respiratory system. larynx bronchi trachea pharynx Your voice may be affected by health behaviors. For example, smoking irritates structures in the throat and can cause hoarseness. What are some other factors that can affect your voice? health.glencoe.com
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VOCABULARY bronchitis pneumonia pleurisy asthma sinusitis tuberculosis emphysema Care and Problems of the Respiratory System YOU’LL LEARN TO Analyze the relationship between health promotion and the prevention of respiratory disorders. Examine the effects of health behaviors on the respiratory system. Relate the importance of early detection and warning signs that prompt individuals to seek care for respiratory problems. or your body to function properly, all your body systems must F be healthy and working together. Respiratory system problems can affect the functioning of other body systems. Health Behaviors and the Respiratory System any respiratory system disorders can be prevented by practic- M ing positive health behaviors. The single most important decision you can make for respiratory health is not to smoke. Smoking damages the respiratory system and is the main cause of lung cancer. Tobacco use has also been connected with cancers of the mouth, pharynx, and larynx. It can cause bronchitis, emphysema, and an increase of asthma in children and adults. In teens, smoking reduces the rate of lung growth. Avoiding the use of tobacco and all secondhand smoke, including smoke from cigarettes, cigars, pipes, and marijuana, greatly reduces your risk of all these effects. Think about a time when you experienced a problem with your respiratory system. How did it affect your daily activities? What treatment did you receive? 432 Chapter 16 Cardiovascular and Respiratory Systems Imagine not being able to perform so simple an act as climbing a single flight of stairs without having to stop to catch your breath. What are some reasons for shortness of breath? HS_HEALTH_U05_C16_L4 12/8/03 12:19 PM Page 432
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Regular physical activity is also important to the health of the respiratory system. Increased respiration during exercise improves the capacity of the lungs to diffuse oxygen into the blood. Exercise also increases the total amount of air moved into and out of the lungs per minute.
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