Physical barrier of the nasal mucosa

The physical barrier of the nasal mucosa is composed primarily of tightly connected epithelial cells, forming a continuous cellular lining that separates the external environment from submucosal tissues[1][2][4][6]. This barrier functions by preventing allergens, pathogens, and particulates from infiltrating deeper tissues, supported by specialized structures like tight junctions, adherens junctions, and desmosomes[1][2]. The barrier works together with mucus (chemical barrier), immune structures (immune barrier), and microbiota (microbiological barrier) to provide layered protection for the respiratory tract[1][2][6]. Dysfunction or damage to this physical barrier can lead to increased susceptibility to allergic diseases, infections, and other inflammatory conditions[1][4][6].

Other names

Mechanical barrier of the nasal mucosaEpithelial barrier of the nasal mucosa