震惊!蓝色的血液!鲎的血液是蓝色的。这是因为鲎的血液中携带的氧靠铜运输,而含铜的蛋白质结合物呈蓝色,所以血液也呈蓝色。海洋中的“活化石”鲎是节肢动物,出现在古生代的泥盆纪,距今已有4亿多年的历史了。它是地球上最古老的物种之一,有“活化石”之称。当时恐龙还没有崛起,原始鱼类也刚问世,后来与它同时代的动物要么进化、要么灭绝,只有它还一如既往地保持着原始而古老的相貌。 Shocked! Blue blood! Blood is blue. This is because the oxygen carried in the goblet is transported by the copper and the copper-containing protein conjugate is blue, so the blood is also blue. The “living fossils” in the oceans are arthropods, occurring in the Paleozoic Devonian dating back more than 400 million years ago. It is one of the oldest species on Earth, with “living fossils.” At that time, the dinosaurs had not risen yet. The primitive fish had just come out. Later, the animals of its contemporaries were either evolved or extinct, and only the original and ancient appearance of the same remained unchanged.