part of part of has part has part respiratory system nasal cavity mucosa nasal cavity respiratory epithelium respiratory segment of nasal mucosa FMA:77198 pars respiratoria tunicae mucosae nasi UBERON:0015786 lined with ciliated pseudostratified columnar epithelium (respiratory epithelium). The respiratory segment has a very vascularized lamina propria allowing the venous plexuses of the conchal mucosa to engorge with blood, restricting airflow and causing air to be directed to the other side of the nose. The portion of the nasal mucosa that is part of the respiratory system. respiratory zone of nasal mucosa