The document discusses respiratory system function and assessment techniques including: - Oxygen is transported through the blood to tissues and carbon dioxide diffuses in the opposite direction through the respiratory and cardiovascular systems. - Nursing assessment of the respiratory system includes inspection, palpation, percussion, and auscultation to evaluate breath sounds, lung sounds, and respiratory rate, effort, and pattern. - Common lung sounds include crackles, wheezes, pleural friction rubs, and stridor which provide clues about respiratory conditions.