求翻译：人体内铁元素的含量虽少，但有着重要的生理作用，铁是人体中血红蛋白的重要组成成分。血红蛋白之所以能把氧输送到全身的每一个细胞中去，又把各个细胞在代谢过程中产生的CO2运走，与其组成中含有铁元素有着密切的关系。人体中的血液是红色的，也是由于血红蛋白中含有铁元素是什么意思？

Small, but the iron content of the human body has an important physiological role of iron is an important component of hemoglobin in the body. Hemoglobin reason why can transport oxygen to every cell of the body to go away again co2 produced by various cells in the metabolic process, composition con

iron in the body of the element content is minimal, but is there an important biological role in humans, iron is a vital component of hemoglobin. Hemoglobin is the oxygen is supplied to the body of each cell, and the various cells in the metabolic process in CO 2 and its composition contains iron el

In although human body hard element content few, but has the important physiological action, the iron is in the human body the hemoglobin important component.The hemoglobin the reason that can transport the oxygen to in whole body each cell, also CO2 which produces in metabolism process moves away e

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