Laboratory supplies: It is a rare tool for students to carry out relevant practical training. Made of PVC, you don't have to worry about being broken by students, and it's a great addition to your lab supplies. Detailed enough to satisfy students, teachers, or anyone interested in the anatomy of the human body. It can be used as an intuitive teaching aid for the teaching of physiological health knowledge, so as to deepen the understanding of the structure of human organs. The alveolar model is made of high-quality PVC material and has a realistic shape. It can vividly explain relevant knowledge to students through models, so that students can quickly understand and master it. As an intuitive presentation aid for presentation and teaching of human anatomy. The model consists of two parts: the alveolar expansion model and the pulmonary lobule expansion model, showing alveolar, alveolar epithelium, alveolar sac, alveolar duct, alveolar capillary and other structures. It is a rare auxiliary tool for your actual combat training Dimensions: 16.5cm high, 21cm wide, 8cm deep, placed on the floor. Convenient for your teaching presentation. It is the best tool for your teaching demonstration. So as to deepen students' understanding of the physiological activities of human organs.