Orthocromatic erythroblast
Reticulocyte Megakaryocyte
Lymphocyte Monocyte
Granulocyte
RBC
Platelet1s5
骨髓外造血
extramedullary hematopoiesis
——婴幼儿时期,当因感染、溶血、失血等原因 发生贫血时,骨髓以外的组织和脏器(肝、脾、 淋巴结)恢复到胎儿时期的造血状态以增加造血 满足机体需要,临床可表现为肝、脾、淋巴结肿 大,周围血中出现有核红细胞及幼稚粒细胞。
12 Mosby items and derived items © 2005, 2001 by Mosby, Inc.
生后造血
造血干细胞→造血祖细胞 → 原始血细胞→幼稚血细胞 →成熟血细胞
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肝(脾)造血期
肝:胚胎 6~8周─→24周┄→(红、粒) 脾:胚胎 8周─→20周(红、粒)
胚胎 12周─→终生(淋巴、单核) 胸腺:胚胎 6~7周─→终生(淋巴) 淋巴结:胚胎 11周─→终生(淋巴)
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骨髓造血期时间:胎龄20来自24周─→终生9 Mosby items and derived items © 2005, 2001 by Mosby, Inc.
中胚叶
10 Mosby items and derived items © 2005, 2001 by Mosby, Inc.
生后造血