A lesson about the respiratory system starts with an overview of the system and a graphic of the exterior of the lungs with overview text in the text box. The lesson becomes more specific as do the graphics as it moves into the interior of the lungs and shows how gas is exchanged in the alveoli. The Links button displays a list of related topics with icons designating whether it is a video, text, graphic, lesson, or quiz. Students can click on areas in the graphics window to highlight a portion of the illustration and see the part's name. They can double click on the image to see close ups and rotate it on one or more axes.
Students can hear the pronunciation of the names of specific parts.
Quizzes with 10 multiple choice questions are available to test the students' knowledge of the content presented in the video lectures and lessons. Students can look for particular topics using actual words or phonetic spellings with a word search. A glossary contains definitions of anatomical terms.