Keep some blood plasma back for the serious cases.
留一些给重病号。
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Just like other connective tissues, blood develops from mesenchyme and is made up of cells surrounded by an extracellular nonliving matrix: In this case, the ground substance is your blood plasma, which has protein fibers floating around in it.
就像其他结缔组织一样,液由间充质发育而成,由细胞外非生物基质包围细胞组成:在这种情况下,基础物质是你,其中漂浮着蛋白质纤维。