Final answer:
The lung capacity of an average human can hold almost six liters of air. This varies based on genetics, sex, and height.
Step-by-step explanation:
The lung capacity varies based on genetics, sex, and height. At maximal capacity, an average human lung can hold nearly six liters of air. However, lungs typically do not operate at maximum capacity. Lung volumes and capacities are used to measure the amount of air in the lungs. Tidal volume represents the amount of air inhaled during a normal breath, while inspiratory capacity measures the air taken in during a deep breath. Residual volume, on the other hand, refers to the amount of air left in the lungs after forceful respiration.