察“颜”观色

Colours in Nature

世界万物的颜色点亮了我们的生活。今年,EC百科讲堂将带着同学们踏上探秘颜色的旅途,快跟着QQ姐姐来了解一下吧!

Do you know why blood is red?The answer is related to a metal it contains.The main part of our blood is red blood cells.There are many hemoglobin molecules(血红蛋白分子)within the red blood cells,and they contain iron(铁).It is this iron that gives blood its red colour.