Fig. 5From: Assessment of respiratory and systemic toxicity of Benzalkonium chloride following a 14-day inhalation study in ratsIn the nasal tissues of male rats exposed to BAC, black arrows indicate hypertrophy and hyperplasia; black triangles indicate metaplasia; red arrows indicate squamous metaplasia; blue arrows indicate erosion with necrosis; asterisk indicates ulceration with suppurative inflammation; green filled triangles indicate hyperplasiaBack to article page