8.6 POJA-L403
Title: Pseudoglandular period of developing lung (1) Description: Stain hematoxylin-eosin, human embryo. Cross-sectioned future bronchial tubes (1), the surrounding mesenchyme becomes more condensed around the epithelium. The mesoderm of the future visceral pleura (2) as well as the future parietal pleura (3) and (4) indicates pleural cavity. The cartilagineous spinal column (5) contains intersegmental arteries (6). (7) indicates cartilage primordium of the ribs. (8) indicates descending aorta and (9) is region of atrium. (10) is liver area and (11) indicates left crus of diaphragm. Keywords/Mesh: respiratory tract, lung development, embryo, visceral pleura, parietal pleura, pleural cavity, pseudoglandular period, bronchial tubes, blood vessels, mesenchyme, histology, embryology, POJA collection |
8.6 POJA-L404 (top) Title: Pseudoglandular period of developing lung (2) Description: Stain hematoxylin-eosin, human embryo. The two future lung lobes contain many cross-sectioned future bronchial tubes (1). Note in these epithelial cells the apical position of the nuclei with light-stained basal parts (glycogen). The surrounding mesenchyme becomes more condensed (↓) around the epithelium and in between numerous small blood vessels (c) are present. Future parietal pleura (2) and pleural cavity (X) are indicated. 8.6 POJA-L405 (bottom) Title: Pseudoglandular period of developing lung (3) Description: Stain hematoxylin-eosin, human embryo. Two cross-sectioned future bronchial tubes. Note the basal position of the nuclei with light-stained apical cytoplasm (↓, glycogen). The surrounding mesenchyme condenses (1) around the epithelium and developing capillaries and small blood vessels (*) are present. Future visceral pleura (2) and pleural cavity (3) are indicated. |