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Fig. 7: Pca - detail of septal pores

Higher magnification of the above septum in planar view and the septal pores (sp) that connect adjacent alveoli. The pores always lie next to the junction of the septum with the outer alveolar membrane. EM taken on 11/2/68 by R. Allen with Philips 300 TEM. Neg. 39,900X. Bar = 0.1µm.
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