Give a brief description for each of the following:
a) Describe the structures of the pulmonary system
b)Describe the pressures in the alveoli and pleural sac, and theflow of air during all the stages of an inhalation andexhalation
c)Describe the role of surfactants, and how they work.
d) Describe how flow of blood to regions of the lungs changes tomatch the flow of air
