Dissection: Lungs

We dissect and examine a cow\u2019s lungs. Before the dissection, the lungs are inflated to show the changes in volume that occur when mammals breathe. During the dissection the position and function of different parts are examined, including the trachea, bronchi, bronchioles and pleural membrane. Biology - Human Body - Learning Points. The structure of the lungs is related to their function. Lungs are organs of gas exchange. Lungs provide a large surface area for the diffusion of oxygen into the blood while carbon dioxide moves in the opposite direction. Ventilation rate and depth decreases with exercise. The composition of air breathed in is different to that breathed out. A Twig Experiment Film. Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.