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人体的免疫功能主要有细胞免疫和体液免疫二类。干细胞在骨髓中衍化成淋巴细胞后,一部分进入胸腺受胸腺激素培育成T淋巴细胞,进入周围血循环发挥细胞免疫作用。另一部分淋巴细胞发育成B 淋巴细胞。这一发育过程鸟类是在腔上进行,人类是在骨髓、消化道淋巴组织(扁桃体、肠壁
The body’s immune function are mainly two types of cellular immunity and humoral immunity. After stem cells are differentiated into lymphocytes in the bone marrow, some enter the thymus and grow into T lymphocytes by thymus hormones and enter the peripheral blood circulation to play the role of cellular immunity. Another part of the lymphocytes develop into B lymphocytes. Birds of this development are carried out on the luminal, and humans are found in the bone marrow, digestive tract lymphoid tissues (tonsils,