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human respiratory system model 3D, in this course helps students explore one of the most vital systems in the human body through a practical and creative science project. This course provides step-by-step guidance on building a 3D working model of the respiratory system using simple materials such as balloons, straws, bottles, and clay to represent organs like the lungs, trachea, and diaphragm. Learners will study how air enters through the nose or mouth, passes down the trachea, and fills the lungs where oxygen exchange takes place, while carbon dioxide is expelled. The course explains the role of each organ and demonstrates the breathing mechanism by showing how the diaphragm’s movement controls inhalation and exhalation. Through hands-on construction, students will not only strengthen their understanding of anatomy and physiology but also develop skills in model-making and scientific presentation. By the end, participants will be able to create a functional 3D model, ideal for classroom learning, science fairs, or home projects, that visually explains the importance of respiration in sustaining life. howtofunda