Benefit Effect of Dendrobium officinale Ultrafine Powder on DSS-Induced Ulcerative Colitis Rats by Improving Colon Mucosal Barrier

Table 2

Histological scoring system [21].

Score	Inflammation	Mucosal damage	Crypt damage	Range of lesions (%)
0	None	None	None	0
1	Mild	Mucous layer	1/3	1–25
2	Moderate	Submucosa	2/3	26–50
3	Severe	Muscularis and serosa	100%	51–75
4	—	—	100% + epithelium	76–100