Table 2.

The microscopic appearance of each group.

	H&E	Masson
Blank group (Fig. 4A)	The mucosal glands are arranged in a single or double layer, the submucosal interstitial vasodilation is not obvious, and short irregular crypts are visible in the canal transition area	Submucosal collagen fibres are loosely arranged
Modelling for 1 week group (Fig. 4B)	The number of mucosal glands increases, the glands can be arranged in multiple layers, the submucosal interstitial blood vessels are dilated, the curvations are obvious, the number of capillaries is increased, and inflammatory cell infiltration is increased	Submucosal collagen fibres are densely arranged
Modelling for 2 weeks group (Fig. 4C)	Submucosal interstitial vasodilation, marked tortuousness, tissue loosening, space enlargement, accompanied by an increase in the number of inflammatory cells, interstitial fibrous muscular hyperplasia, structural relaxation	Under the mucosa, vasodilation, there is obvious tortuosity; the dense arrangement of collagen fibres is increased, with muscle fibres interspersed
Modelling for 1 week; normally reared for 2 weeks (Fig. 4D)	The decrease in vasodilated hyperplasia was less significant than that in the modelling for 1 week group	Similar to the modelling for 1 week group
Modelling for 2 weeks; normally reared for 2 weeks (Fig. 4E)	The decrease in vasodilated hyperplasia was less significant than that in the modelling for 2 weeks group	Similar to the modelling for 2 weeks group