•HSC 是存在于造血组织中的一群最原始的造血细胞。具有高度自我更新和自我复制的能力。•所有的血细胞都是由骨髓内的多能干细胞发育、分化而来的。造血干细胞( HSC)BloodBloodBloodBloodSerum Serum or or PlasmaPlasmaLeukocytes, Leukocytes, Platelets and RBCPlatelets and RBCSerum ProteinsSerum ProteinsSerum ProteinsSerum ProteinsMononuclear Mononuclear CellsCellsMononuclear Mononuclear CellsCellsPolymorphonuclear Polymorphonuclear leukocytes (or leukocytes (or Granulocytes)Granulocytes)Polymorphonuclear Polymorphonuclear leukocytes (or leukocytes (or Granulocytes)Granulocytes)•ImmunoglobulinsImmunoglobulins•ComplementComplement•Clotting factorsClotting factors•Many othersMany others•ImmunoglobulinsImmunoglobulins•ComplementComplement•Clotting factorsClotting factors•Many othersMany others•NeutrophilsNeutrophils•EosinophilsEosinophils•BasophilsBasophils•NeutrophilsNeutrophils•EosinophilsEosinophils•BasophilsBasophils•Lymphocytes Lymphocytes (T cells, B cells (T cells, B cells & NK cells)& NK cells)•MonocytesMonocytes•Lymphocytes Lymphocytes (T cells, B cells (T cells, B cells & NK cells)& NK cells)•MonocytesMonocytes血液的成分免疫细胞的产生platelets platelets megakaryocyte megakaryocyte eosinophil eosinophil neutrophil neutrophil basophil basophil mast cell mast cell common common myeloid myeloid progenitor progenitor monocyte monocyte macrophage macrophage NaturalNaturalKiller cellKiller cellplasma cell plasma cell B LymphocyteB LymphocyteT LymphocyteT Lymphocyte common common lymphoid lymphoid progenitor progenitor Pluripotent Pluripotent hematopoietichematopoieticstem cellstem cell•人类 B 细胞来自骨髓,并在骨髓中发育成熟•人 B 细胞占外周血淋巴细胞的 10% ~ 20%•在淋巴结中占淋巴细胞的 25%•在脾脏中为淋巴细胞的 50%•骨髓中淋巴细胞主要为 B 细胞•胸腺中 B 淋巴细胞含量较少( <1% )B 细胞的来源与分布B 淋巴细胞的发育 鸟类的法氏囊 (b...