Histological staining
Histological examination of the mucosae (H-001, H-009, H-046) revealed
that they were all covered with pseudostratified columnar epithelium and
contained glands with visible orifices (Table 3, and Fig. 5). These
glands appeared to be serous glands, and the presence of goblet cells
was not observed. In all three mucosae, a nucleus-free zone was observed
between the apical surface of the epithelium and the nuclei of
supporting cells; however, this phenomenon was particularly evident in
H-009. Additionally, peripheral nerves were distributed beneath the
lamina propria in H-009 (Fig. 5).