The small intestinal ring fold is formed by:
选项:
A:The mucosa protrudes into the lumen;
B:The lamina propria of mucosa protrudes into the lumen;
C:The mucosa and submucosa protrude into the lumen;
D:Mucosal epithelium and lamina propria protrude into the lumen;
E:The villi of mucous membrane are uneven in height
发布时间:2024-05-21 13:52:26