Pseudoglandular period of developing lung (human, embryo, low magnification)

Stain: Hematoxylin and eosin. 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 visceral pleura (2) and pleural cavity (X) are indicated.