15/09/2026
Animals living in completely different environments have evolved respiratory systems that meet very different demands. The common ostrich is presented with a total respiratory capacity of about 15 liters, supported by its extensive network of air sacs that makes avian breathing highly efficient. A gray wolf has an estimated lung capacity of roughly 3–5 liters, while the harbor seal is shown at around 2 liters. Since these measurements can change with factors such as body size, age, s*x, and testing methods, they should be viewed as approximate figures rather than exact limits. Overall, the comparison highlights how breathing systems are shaped by lifestyle, from active movement on land to the specialized requirements of marine mammals that regularly dive.