To bridge the textbook compartmentalization of science courses and to bring the spirit of interdisciplinary investigation into the classroom, the author uses scuba technology as a high interest, practical example that requires a working knowledge of the gas laws and the human respiratory system. Inclusion of scuba in an interdisciplinary science curriculum was a natural link between physics and biology. However, this lesson could also provide a review of the gas laws in a traditional biology class or reinforce the complexities of human physiology in a standard chemistry or physics class.