Review of physical concepts and laws governing fluids; composition and percentages of atmospheric gases. Principles, operations, maintenance, and identifying characteristics of primary gas systems. Rationale, indications, contraindications, hazards, and maintenance of common Medical Gas delivery systems. Humidity and humidifiers; aerosol and nebulizers; administration of aerosolized solutions; gas analysis and analyzers. Patient care procedures, physical assessment, laboratory assessment, communication skills and charting, and patient care issues. Ethics, professionalism, and civic responsibility in Respiratory Care.