The human alveolar expansion model is made of food-grade PVC material and has a realistic shape. Models can visually explain relevant knowledge to students through models, allowing students to quickly understand and master. The model consists of two parts: the alveolar expansion model and the lung lobe expansion model. Displays alveoli, alveolar epithelium, alveolar sacs, alveolar ducts, alveolar capillaries and other structures. It is a rare auxiliary tool for your practical training. The level of detail is sufficient to satisfy students, teachers, or anyone interested in the anatomy of the human body. It can be used as an intuitive teaching aid for teaching physical health knowledge, thereby deepening the understanding of the structure of human organs. Dimensions: 16.5cm high, 21cm wide, 8cm deep, placed on the floor. Convenient for your teaching demonstrations. The best tool for your teaching presentations. This will deepen students' understanding of the physiological activities of human organs. Laboratory supplies: They are rare tools for students to carry out relevant practical training. Made of PVC, there is no need to worry about it being damaged by students, so it will be a great addition to your lab supplies.