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.
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