Fig. 4From: Effect of formaldehyde inhalation on rabbit nasal mucosa: a light microscopic study—an animal model for inhalational irritants on nasal mucosaOlfactory nerve (group 2) showing shrinkage of the nerve bundles within the perineural sheath, leaving empty spaces (red arrow) with evidence of edema within the nerve fibers (black arrow) (H&E ×10)Back to article page