What happens to blood when it is pumped into the thin-walled blood vessels of the lungs

A trout exposed to acid mine drainage experiences an increase in mucus production along the gills. According to Fick’s law of diffusion, how would that affect the movement of oxygen through the gill capillaries?

Which of the following animals are the only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart? fishes birds mammals amphibians reptiles

Asthma is a very common disease. It is characterized by widespread narrowing of the bronchioles and formation of mucus plugs, producing symptoms of wheezing, shortness of breath, and coughing, and is caused by the release of factors during an allergic response. Explain why the narrowing of bronchioles, rather than that of the larger bronchi, is the source of the airflow restriction, and why inhaling dilating agents can bring relief during an asthma attack.