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红髓

红髓、红脾髓
标识字符
拉丁文pulpa splenica
TA98A13.2.01.005
TA25175
FMAFMA:15844
格雷氏p.1284
解剖学术语

红髓,亦作红脾髓,是脾脏的一部分,与白脾髓一起构成脾脏的主要部分。红脾髓的主要功能是过滤和储存血液,由脾索及血窦组成,但因为其不含输入淋巴管,所以脾脏不能过滤淋巴的功能。“血窦”是储存后备血液的结构,平时一部分血液滞留在血窦中,当人体失血时,血窦收缩,将这部分血液释放到外周以补充血容量。血窦的壁上附着大量巨噬细胞,可以吞噬衰老的红血球病原体和异物。脾的质地较脆且血运丰富,因此一旦受到强大外力打击,很容易破裂,脾破裂会导致严重的大出血,是能够致死的腹部急症之一,必须紧急抢救。较小的破裂可以缝合修补,但很多时候难免要将脾切除。红髓中存有人体一半的单核白血球(Monocytes),当受伤时可以随即作出反应。因此,与不同,脾切除后病人可以正常生活;但他们明显的表现出抵抗力下降和易受感染

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红髓
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