The<br/>peripheral immune organs include () A: lymphoid nodes B: spleen C: bone<br/>marrow D: mucosa-associated lymphoid tissue E: thymus

_____ is a hormone secreted by the thymus that can stimulate the immunological activity of lymphoid tissue.

The secondary lymphoid organs include the _____, lymph nodes, tonsils, appendix and Peyer patches in the small intestine.

As to the healing of ulcers, the result is___ A: Epithelium and granulation tissue B: Fibroblasts and muscle tissue C: Muscle cells and connective tissue D: Lymphocytes and lymphoid tissues E: No shortage of fixed cells and tissues

The functions of the spleen don’t include:() A: Elimination of aging blood cells B: Immune reaction C: Production of plasma cells D: Proliferation of lymphocytes E: Differentiation and development of lymphoid hematopoietic stem cells

关于弥漫性毒性甲状腺肿病理变化的描述中，错误的说法是 A: asymmetrical enlargement of thyroid B: epithelium hyperplasia C: vascular congestion and lymphoid infiltration in the stroma D: epithelium is columna E: little colloid with absorption vacuoles