11 Gas Exchange in HumansGas Exchange in Humans1. Describe the features of gas exchange surfaces in humans, limited to: large surface area, thin surface, good blood supply, and good ventilation with air.2. Identify in diagrams and images the following parts of the breathing system: lungs, diaphragm, ribs, intercostal muscles, larynx, trachea, bronchi, bronchioles, alveoli, and associated capillaries.3. Investigate the differences in composition between inspired and expired air using limewater as a test for carbon dioxide.4. Describe the differences in composition between inspired and expired air, limited to: oxygen, carbon dioxide, and water vapour.5. Investigate and describe the effects of physical activity on the rate and depth of breathing.6. Explain the differences in composition between inspired and expired air.7. Explain the link between physical activity and the rate and depth of breathing in terms of: an increased carbon dioxide concentration in the blood, which is detected by the brain, leading to an increased rate and greater depth of breathing.8. Explain the role of goblet cells, mucus, and ciliated cells in protecting the breathing system from pathogens and particles.