Diaphragm exercise simulator (red lung lobe) Overview A hands on educational model designed to demonstrate how diaphragm movement changes chest volume and affects lung inflation. Aligned with the junior school biology textbook, this simulator makes abstract respiratory mechanics visible and easy to understand. Key benefits Clear visualization of diaphragm function and chest volume change for classroom learning. Simple, repeatable operation that lets students observe lung inflation and deflation in real time. Durable, lightweight design for easy handling, storage, and transport. Curriculum aligned tool for lectures, lab sessions, and practical assessments. Features and specifications Product: Diaphragm exercise simulator (red lung lobe) Components: transparent plastic container, elastic rubber bottom, rubber stopper, red lung lobe model, transparent inverted Y shaped trachea connecting the two lung lobes Function: pulling down the center of the rubber bottom increases internal volume and inflates the lung lobes; releasing or pushing up the rubber bottom causes the lung lobes to deflate or shrink Size: bottom diameter 110 mm, height 210 mm Weight: 245 g Package includes: 1 diaphragm exercise simulator Setup and operation Remove the rubber bottom and introduce a small amount of air into the lung lobes through the inverted Y shaped trachea so the lobes are slightly expanded. Reinstall the rubber bottom to create a closed container while the lung lobes remain connected to outside air via the trachea. Pull down the middle of the rubber bottom to simulate diaphragm contraction and observe the lung lobes inflate. Loosen the rubber bottom to allow the lobes to to a slightly inflated state. Push up the rubber bottom to simulate diaphragm relaxation and observe the lung lobes shrink. Materials and performance Transparent plastic body for clear observation of internal changes. Elastic rubber bottom provides smooth, repeatable motion to simulate diaphragm movement. Inverted Y shaped trachea and paired lung lobes visually demonstrate air flow and bilateral lung behavior. Practical applications Classroom demonstration: Teacher guided demonstration of breathing mechanics during a biology lesson. Laboratory practicals: Small group activities where students operate the model and record observations relating chest volume to lung inflation. Homework or study aid: Individual students use the simulator to reinforce concepts covered in class and prepare for assessments. Notes Actual product color may vary slightly from images due to display and lighting differences. Manual measurement tolerance: please allow 0 to 2 cm difference. This simulator provides a straightforward, reliable way to make respiratory mechanics tangible for students and educators.