Chart the path of air from the atmosphere to the blood.

Answer to q. 1

Air would travel through the following structures in this order: nasal cavity, pharynx, larynx, trachea,
bronchioles, alveolar duct, alveoli, and finally the pulmonary capillaries.

Answer to q. 2

Amphibians have the simplest lung - it is not convoluted and thus has a low surface area. In addition,
air is pushed into their lungs which limits flow. Mammals have far more convoluted lungs to increase
surface area and have the anatomy to draw air into the lung. However, there is still a delay as air
comes in and then goes out. Birds on the other hand have convoluted lungs and a system to draw air
continually over the absorptive surface of the lung.

Easily the best answer

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