Fig. 5. Masson-trichrome stain of the NS. The right image is a magnified image of dotted rectangular area of the left one. Note the posterior septal branches of the SPA and SPV are shown with close proximity. The perpendicular plate of the ethmoid bone is shown with arrowheads. NS, nasal septum; SPV, sphenopalatine vein; SPA, sphenopalatine artery. White scale bar: 5 mm, black scale bar: 500 μm.
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