Skip Navigation
Stage 1 / 1 day Stage 2 / 2-3 days Stage 3-1 / 4 days Stage 3-2 / 4-5 days Stage 4 / 6 days Stage 5a-1 / 7 days Stage 5a-2 / 8 days Stage 5b / 9 days Stage 5c / 12 days Stage 6 / 13-17 days Stage 7 / 16-19 days Stage 8 / 23 days Stage 9 / 25 days Stage 10 / 28 days Stage 11 / 29 days Stage 12 / 30 days Stage 13 / 32 days Stage 14 / 33 days Stage 15 / 36 days Stage 16 / 39 days Stage 17 / 41 days Stage 18 / 44 days Stage 19 / 45-47 days Stage 20 / 49 days Stage 21 / 49-52 days Stage 22 / 52-55 days Stage 23 / 56 days
Carnegie Stage   Figure

Section through the pulmonary region - Drawing

Section through the pulmonary region - Drawing

Differentiation of the Mesenchymal Tissues of the Pulmonary and Esophageal Regions.

Section through the pulmonary region, showing the primary bronchi surrounded by vascularized mesenchymal tissue and mesothelium (pleura). The pulmonary mesenchyme still abuts against that of the alimentary canal. At stage 14 the coelomic epithelium has virtually ceased proliferating and the mesenchyme is arranging itself into zones. Angioblasts are forming a net that outlines the esophagus.

Detail from Fig 15-6, O'Rahilly and Müller, 1987.


Keywords: alimentary canal, angioblasts, coelomic epithelium, esophageal margin, lung epithelium, primary bronchus, pulmogenic coat, pulmonary mesenchyme


Source: The Virtual Human Embryo.