Chapter 23: The Respiratory System

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Chapter 23: The Respiratory SystemI. The Respiratory System : An Introduction, p. 814Objectives:1. Describe the primary functions of the Respiratory Explain how the delicate Respiratory exchange surfaces are protected frompathogens, debris, and other hazards. Our cells produce energy for maintenance, growth, defense and division throughmechanisms which require oxygen and produce carbon dioxide. We obtainoxygen from the air, which diffuses across delicate exchange surfaces on ourlungs. Oxygen is carried to the cells by our cardiovascular System , which alsoreturns carbon dioxide to the of the Respiratory System , p. 814 The Respiratory System has 5 basic functions:1. Providing an extensive surface area for gas exchange between air andcirculating Moving air to and from the exchange surfaces of the Protecting Respiratory surfaces from the outside Producing Participating in the olfactory of the Respiratory System , p. 814Figure 23-1 The Respiratory System is divided into the upper Respiratory System , above thelarynx, and the lower Respiratory System , from the larynx down.

• The respiratory mucosa, consisting of an epithelial layer and an areolar layer, lines the conducting portion of the respiratory system. • In the upper respiratory system, trachea and …

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