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血液是人体中极其重要的物质,失去血液人们就终止了生命。我们从饮食中得到的各种营养、肺部吸收而来的氧气,都需要血液的帮助运往全身,人体组织产生的废物也需要血液运送到体外,人生病时服进体内的药物也需要血液的帮助才能发挥治病作用。
Blood is an extremely important substance in the body, and people are killed when they lose their blood. The various nutrients that we get from our diet and the oxygen we breathe from our lungs all need the help of blood to transport the whole body. The waste generated by human tissues also needs blood to be transported to the outside of the body. The drugs that are taken into the body when people are sick also need blood Help to play a role in treatment.