Figure 1

Classification of the study animals based on liver-collagen content. Photomicrographs of liver sections stained with Sirius red are representative of control and treatment groups. Rats under CCl₄ inhalation treatment were classified based on the evidence into three different groups according to the histological quantification of their liver-collagen content: mild/moderate fibrosis (< 6% fibrotic area), severe fibrosis (6 to 11% fibrotic area) and cirrhosis (> 11% fibrotic area). Original magnification ×100.