100_Chap_14_Respire_Sum_10

100_Chap_14_Respire_Sum_10 - The Respiratory System Chapter...

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Chapter 14 The Respiratory System
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The Respiratory System Breathing moves air in and out of the lungs. External respiration is the exchange of oxygen and carbon dioxide between the lungs and the blood. Internal respiration is the exchange of oxygen and carbon dioxide between blood and the body tissues. Gas transport moves oxygen and carbon dioxide between the lungs and the body tissues. Oxygen transport Figure 14.1 Tissue Gas diffusion Gas diffusion Carbon dioxide transport Lungs
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The Respiratory System Four processes play a part in respiration: 1. Breathing (ventilating) 2. External respiration . as transport 3. Gas transport 4. Internal respiration
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The Respiratory System Figure 14.3
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The Upper Respiratory System Nasal cavity • Produces mucus • Filters, warms, and oistens air Pharynx • Passageway for ir and food Sinuses • Cavities in skull • Lighten head • Warm and moisten air UPPER RESPIRATORY SYSTEM • Filters, warms, and moistens air Figure 14.2 (1 of 2) moistens air • Olfaction air and food Intercostal muscles Diaphragm • Muscle sheet between chest and abdominal cavities with a role in breathing RESPIRATORY MUSCLES • Cause breathing • Move ribs during breathing
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The Respiratory System The nose Cleans incoming air Warms and moistens the air rovides for the sense of smell Provides for the sense of smell
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Figure 14.4a
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The Respiratory System The sinuses Lighten the head Adjust air quality The pharynx The space behind the nose and mouth Provides a passageway for food and air
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The Lower Respiratory System Epiglottis • Covers larynx during swallowing Lungs • Structures that contain alveoli and air passageways Allow exchange of Larynx • Air passageway • Prevents food and drink from entering lower respiratory system LOWER RESPIRATORY SYSTEM • Exchanges gases Figure 14.2 (2 of 2) Bronchi • Two branches of trachea that conduct air from trachea to each lung Bronchioles • Narrow passageways to conduct air from bronchi to alveoli • Allow exchange of oxygen and carbon dioxide between atmosphere and blood Alveoli • Microscopic chambers for gas exchange Trachea • Connects larynx with bronchi leading to each lung • Conducts air to and from bronchi • Produces voice
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The Respiratory System The larynx An adjustable entrance to the respiratory system Controls the position of the epiglottis to prevent aterials from entering the lower respiratory materials from entering the lower respiratory system The source of the voice
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Epiglottis Larynx Figure 14.5a (a) The epiglottis is open during breathing but covers the opening to the larynx during swallowing to prevent food or drink from entering the trachea. Front view
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This note was uploaded on 10/06/2011 for the course BIO 100 taught by Professor Staff during the Spring '11 term at S.F. State.

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100_Chap_14_Respire_Sum_10 - The Respiratory System Chapter...

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