Description: 【Interactive Demonstration Tool】: This lung breathing simulator effectively illustrates the relationship between the lungs and diaphragm, making it an ideal educational tool for teachers to demonstrate gas exchange with the external environment 【Realistic and Detailed Design】: The model features detachable lung lobes, a flexible base, and a thickened outer cover, all crafted to provide a lifelike appearance and detailed structural analysis 【Comprehensive Construction】: Composed of a transparent container, elastic base, rubber stopper, and lung lobe models. The rubber stopper includes a Y shaped trachea made of transparent that connects to both lungs 【Easy to Understand】: Simply pull onto the bottom rubber section to view of how the lungs work, apparatus that consists of two sacs, which represent the lungs, a rubber membrane. 【 Materials 】: Made from pp and rubber materials ,this Educational Toy is durability Size Chart: 10x21cm/3.94inchx8.27inch Package Includes: 1 Lung Teaching Model Toy