The document summarizes the key components and functions of the respiratory system in 3 paragraphs or less: The respiratory system provides oxygen to cells and removes carbon dioxide. It consists of the upper respiratory tract which warms and filters air, and the lower respiratory tract including the lungs where gas exchange occurs across the alveolar membranes. The lungs are protected by the pleural membranes and respiratory muscles including the diaphragm and intercostal muscles control breathing by changing thoracic pressure and volume during inhalation and exhalation.

1. Chapter 23: The Respiratory System Biol 141 A & P

5. Components of the Respiratory System Figure 23–1 3D Peel-Away of Respiratory System PLAY

8. The Respiratory Epithelium Figure 23–2

13. How are delicate respiratory exchange surfaces protected from pathogens, debris, and other hazards?

15. The Upper Respiratory System Figure 23–3

23. What is the structure of the larynx and its role in normal breathing and production of sound?

35. Anatomy of the Trachea Figure 23–6 What is the structure of airways outside the lungs?

43. Relationship between Lungs and Heart Figure 23–8

46. Bronchi and Lobules Figure 23–9 A Primary Bronchus Branches to form secondary bronchi (lobar bronchi) 1 secondary bronchus goes to each lobe

49. The Bronchioles Figure 23–10 Bronchitis: Inflammation of bronchial walls: causes constriction and breathing difficulty

64. Pleural Cavities and Pleural Membranes Figure 23–8

68. What physical principles govern the movement of air into the lungs?

81. What are the origins and actions of the respiratory muscles responsible for respiratory movements?

83. The Respiratory Muscles Figure 23–16c, d

94. Respiratory Volumes and Capacities Figure 23–17

111. How is oxygen picked up, transported, and released in the blood? What is the structure and function of hemoglobin?

114. Oxyhemoglobin Saturation Curve Figure 23–20 (Navigator) Environmental Factors Affecting Hemoglobin PO2 of blood, Blood pH, Temperature Metabolic activity within RBCs

117. pH, Temperature, and Hemoglobin Saturation Figure 23–21

121. Fetal and Adult Hemoglobin Figure 23–22

124. How is carbon dioxide transported in the blood? Carbon Dioxide Transport Figure 23–23 (Navigator) Respiration: Carbon Dioxide and Oxygen Exchange PLAY InterActive Physiology: Respiratory System: Gas Transport PLAY

128. Summary: Gas Transport Figure 23–24

142. Chemoreceptor Responses to PCO 2 Figure 23–27

151. Respiratory Performance and Age Figure 23–28

155. The Respiratory System and Other Systems Figure 23–29