题目信息
Peyer's patches, located in the lowest portion of the small intestine, are regions of lymphatic tissue in the intestinal wall that identify antigens within the intestine and facilitate the immune response to them.
A:are regions of lymphatic tissue in the intestinal wall that identify antigens within the intestine and facilitate
B:by means of regions of lymphatic tissue in the intestinal wall which identify antigens within the intestine, facilitating
C:are regions of lymphatic tissue in the intestinal wall and, as such, are identifiers of antigens within the intestine, facilitating
D:being regions of lymphatic tissue in the intestinal wall, identifying antigens within the intestine, and facilitating
E:regions of lymphatic tissue in the intestinal wall which identify antigens within the intestine and are facilitating
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A:are regions of lymphatic tissue in the intestinal wall that identify antigens within the intestine and facilitate
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