Figure 3
From: Characteristics of pulmonary microvascular structure in postnatal yaks
Images of the blood–air barrier at different developmental stages under TEM (scale bar represents 0.5 µm, 10,000×). (A) Cross-sectional view of the blood–air barrier in 1-day old, 30-day old, 180-day old, and adult animals under TEM. (B) The graph represents measurement analysis of the ABB. (C) The graph represents the proportions of AE, CT and CE. As age increased, the CE gradually increased, whilst the AE gradually decreased, and the CT showed almost no change. TEM, transmission electron microscopy; Cap, capillary; AE, alveolar epithelium; CT, connective tissue; CE, capillary endothelium; ABB, blood–air barrier.
