alveoli is the respiratory zone where
apex of the lungs is where
base on the lungs sits
capillaries are composed of
cappilaries surround alveoli like
cardiac notch is where
cilli help what
macrophages constantly do what
main bronchus goes
pores
pulmonary arteries bring
respiratory membrane is composed of
space between the lungs is called
surfactant does what
the lugs are attached where
type one cells are composed of
type two cells make what
wall of respiratory membrane includes
what has to get through the respiratory membrane
what surrounds alveoli