The term for the process by which plants lose water vapor is called transpiration. Through small openings known as stomata on their leaves, plants release water vapor into the atmosphere as part of their respiratory function. Transpiration is crucial for several reasons: it helps regulate the plant's temperature, aids in the uptake of nutrients from the soil, and contributes to the water cycle by returning moisture to the atmosphere. This process also creates a pull that assists in the movement of water and minerals from the roots to various parts of the plant.