. Johnson's new universal cyclopaedia : a scientific and popular treasury of useful knowledge. and in which the capillaries derived from the pulmonaryarteries form a close j)lexus with rounded or oval meshes.They are lined at birth by a layer of flat granular, nucle-ated hexagonal epithelial cells, which form a continuouslining for both the air-vesicles and the alveolar passages.In the adult only a part of the cells retain these characters,the rest being transformed into thin structureless plates.This epithelium, the existence of which has been a matterof dispute until quite recently, is best
GLIX-115-2AFPRBK
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. Johnson's new universal cyclopaedia : a scientific and popular treasury of useful knowledge. and in which the capillaries derived from the pulmonaryarteries form a close j)lexus with rounded or oval meshes.They are lined at birth by a layer of flat granular, nucle-ated hexagonal epithelial cells, which form a continuouslining for both the air-vesicles and the alveolar passages.In the adult only a part of the cells retain these characters,the rest being transformed into thin structureless plates.This epithelium, the existence of which has been a matterof dispute until quite recently, is best