Join the Denver Museum of Nature and Science to explore sheep lungs in-depth during small-group dissections.  Examine anatomy and physiology to learn how we breathe. Conduct a gooey experiment to learn how mucus helps our respiratory system. Reveal why the heart and lungs must work so closely together, and what role alveoli play.  Students in 3rd through 5th grade welcome.  Space is limited; please visit the online calendar to register.