Chapter 19 - Chapter 19 1. State the functions of the...

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Chapter 19 1. State the functions of the respiratory system. A. with circulatory system shares the responsibility of supplying the body with oxygen and disposing of carbon dioxide 1) oversee the gas exchange that occurs between the blood and the external environment 2. Explain the major events in respiration. B. Exchange of gases between the air in the lungs and the blood – external respiration C. Transport of gases by the blood between the lungs and body cells D. Exchange of gases between the blood and the body cells – internal respiration E. Oxygen (O 2 ) use and production of carbon dioxide (CO 2 ) by body cells – cellular respiration 3. Describe the following structures of the oral cavity and identify these structures on diagrams: A. Hard palate - bony portion of the roof of the mouth, continuous posteriorly with the soft palate and bounded anteriorly & laterally by the alveolar arches and the gums. B. Tongue – strong muscle anchored to the floor of the mouth C. Uvula – Fleshy portion of the soft palate that hangs down above the root of the tongue 4. Locate the following structures of the lining of the airway on diagrams: 5. Describe the structure and function of the following structures of the airway. Identify these anatomical features on diagrams: A. Nose 1) two nostrils (external nares) provide openings for air to enter and leave nasal cavity B. Nasal cavity – hollow space behind the nose 1) upper posterior portion, below cribriform plate, contains olfactory receptors – smell 2) remainder conducts air to and from the nasopharynx C. Pharynx – throat – posterior to nasal cavity, oral cavity and larynx 1) passageway for food moving from the oral cavity to the esophagus and air passing between nasal cavity and larynx 2) aids in producing sounds of speech D. Larynx – structure between the pharynx and trachea that houses the vocal cords 1) passageway for air moving in and out of trachea 2) prevents foreign objects from entering trachea E. Trachea – windpipe – tubular organ that leads from the larynx to the bronchi 1) transports air between the larynx and the bronchi F. Bronchial Tree – the bronchi and their branches that carry air from the trachea to the alveoli of the lungs 1) Primary bronchi – left and right primary branches of the bronchial tree 2) Secondary (lobar) bronchi – divisions of the primary bronchi a. 2 on left, 3 on right
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Chapter 19 3) Tertiary (segmental) bronchi – supply a portion of the lung called bronchopulmonary segment a. 8 on left, 10 on right 4) Intralobular bronchioles – small branches of segmental bronchi enter basic units of the lung (lobules) 5) Terminal bronchioles – branch from an intralobular bronchiole a. 50 to 80 terminal bronchioles occupy a lobule of the lung 6) Respiratory bronchioles – short, about 0.5 millimeter in diameter a. few air sacs bud from their sides
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This note was uploaded on 01/14/2011 for the course BIO 142 taught by Professor Unknown during the Spring '10 term at Northern Virginia Community College.

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Chapter 19 - Chapter 19 1. State the functions of the...

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