External respiration can also be referred to as pulmonary respiration or simply breathing. It involves the exchange of oxygen and carbon dioxide between the atmosphere and lungs through inhalation and exhalation. Another synonym for external respiration is ventilation, which refers to the movement of air in and out of the lungs. The process of external respiration is fundamental to human survival, as it provides oxygen for the body's metabolic processes and eliminates wastes such as carbon dioxide. Other synonymous terms include pulmonary gas exchange, breathing mechanics, and gas diffusion across the alveoli. Understanding the various synonyms for external respiration is essential for effective communication among healthcare professionals in medical settings.