The lung model with diaphragmatic movement simulator is a highly effective tool for teaching students about the functioning of the human respiratory system.It provides a visual and hands-on representation of how the lungs work to facilitate breathing. Features -Color:As Shown-Material:Plastic Rubber-Size:19.00X11.00X11.00cm/7.47X4.32X4.32in-This is a perfect teaching tool which will let the student learn the principle of human lung breathing.-Good as educational toy, which can help your children recognize their body construction.-Increase knowledge and develop students’ brains, and makes your children fall in love with hands-on.-Provides a first-hand understanding of how the lungs work and how other structures contribute to lung function.-Composed of two lung-like sacs, a rubber diaphragm, and a transparent casing that simulates the chest cavity.Packing list: 1 x lung breathing model