Which of the following is NOT considered a sense organ?

The lungs are classified as an organ involved in the process of respiration and gas exchange rather than a sense organ. While the lungs play a vital role in the respiratory system, they do not have the function of perceiving environmental stimuli, which is the primary role of sense organs.

The eyes, ears, and skin all serve as sense organs. The eyes detect light and enable vision, the ears are responsible for hearing and balance, and the skin has receptors sensitive to touch, pressure, temperature, and pain, contributing to the sense of touch. Thus, understanding the specific functions of these organs clarifies why the lungs do not fit the definition of sense organs.