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答:动物的血液都是由血浆和血细胞组成的。血的颜色是由存在于血浆或血细胞中的血色蛋白所决定的。不同的血色蛋白由于所含化学元素各异,造成不同颜色的血液。含铁(Fe)的血色蛋白液呈红色,存在于环节动物的血浆中使血液也呈红色;含铜(cu)的血色蛋白叫血蓝蛋白,溶于血浆中使血液呈蓝色或青色;含钒(V)的血色蛋白叫血绿蛋白,溶于血浆中使血液呈绿色等。一些
A: The animal's blood is composed of plasma and blood cells. Blood color is determined by the presence of hemoglobin in plasma or blood cells. Different hemoglobin due to the different chemical elements, resulting in different colors of blood. The ferrous (Fe) -containing hemoglobin solution is red and present in the plasma of the annelid animal so that the blood is also red; the cu-hemocyanin is called hemocyanin and dissolves in the blood plasma to make the blood blue or cyan; Containing vanadium (V) of the hemoglobin protein called blood-green protein dissolved in plasma so that the blood is green and so on. some