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This module introduces the respiratory system, highlighting its essential role in maintaining life by providing oxygen to the body and removing carbon dioxide. Students will explore the anatomy of both the upper and lower respiratory tracts, including key structures like the nose, throat, larynx, trachea, and lungs. The module emphasizes how these structures work together to ensure smooth airflow and efficient gas exchange. Through detailed lessons, learners will gain an understanding of how the respiratory system filters, warms, and moistens air, while protecting the body from harmful substances. The role of the lungs and thoracic cavity in breathing mechanics will also be explored, providing a comprehensive foundation for understanding the respiratory system's structure and function.