血管
血管（德语: Blutgefäße；英语：blood vessels；西班牙语，葡萄牙语: vasos sanguineos）是生物运送血液个管道，依运输方向可分为动脉、静脉搭微血管。动脉从心脏拿血液带到身体组织，静脉拿血液自组织间带回心脏，微血管则连接动脉搭静脉，是血液搭组织间物质交换个主要场所。
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