Introduction

Figure 23.1 The lungs are the core of the respiratory system, which moves oxygen into the body and waste gases out. (attribution: Copyright Rice University, OpenStax, under CC BY 4.0 license)

Chapter Outline

23.1 Introduction to the Upper Respiratory System

23.2 Introduction to the Lower Respiratory System

23.3 Oxygenation and Gas Exchange

The respiratory system allows the body to breathe, talk, and smell. The respiratory system is primarily responsible for bringing oxygen into the body and is a major pathway to remove carbon dioxide and other waste gases. Adequate functioning of the respiratory system depends on having the nervous, cardiovascular, and musculoskeletal systems working properly as well. This will be discussed later in the chapter.

This chapter is separated into three sections: the upper respiratory system, the lower respiratory system (see Figure 23.2), and the system of oxygenation and gas exchange. This chapter will review both the upper and lower respiratory systems and will briefly discuss common conditions that affect the respiratory tract, oxygenation, and gas exchange (Cleveland Clinic, 2023).

Figure 23.2 The respiratory system is divided into the upper respiratory system and lower respiratory system. (credit: modification of work from Anatomy and Physiology 2e. attribution: Copyright Rice University, OpenStax, under CC BY 4.0 license)