Fig. 3From: Functional analysis and evaluation of respiratory cilia in healthy Chinese childrenTransmission electron micrographs illustrating the assessment of epithelial integrity. a Normal nasal epithelium with an intact ciliated surface and minimal disruption (epithelial integrity score = 0, bar = 2 μm). b Abnormal epithelium with severely disrupted cell surface and marked loss of cilia (epithelial integrity score = 4, bar = 2 μm)Back to article page