Size: high 16.5 cm, width 21 cm, depth 8 cm, placed on the floor.Convenient for your teaching presentation.It is the best tool for their teaching presentation, thus deepening students' understanding about the physiological activities of the human organ. The alveolar model is made of food degree PVC material and has a realistic form, so it can animated the relevant knowledge to students through the model, so that students understand and dominate it quickly.It is used as an intuitive demonstration aid for exhibition and teaching of human anatomy. The model consists of two parts: the alveolar enlargement model and the pulmonary valve enlargement model.Shows the alveolus, the alveolar epithelium, the alveolar sack, the alveolar duct, the alveolar capillaries and other structures.It is an exceptional help for your practical training. Laboratory supplies: It is a rare tool for students to perform relevant practical training.PVC material does not have to worry about students breaking it, so it will be a great addition to their laboratory supplies. Detailed enough to satisfy students, teachers or anyone interested in human structure.It can be used as a teaching of knowledge of the physical health of visual aids, in order to deepen the understanding of the structure of the human organ.