人们发现,海龟经过几千公里的漫长旅行,回到它原先产蛋的地方时,会四处张望,流出眼泪。人们不禁要问:是不是因为回到故土而激动地流下泪水?人们还发现它下蛋时也在不停地流泪,是不是下蛋很痛苦?科学家经过研究发现,原来,海龟生活在海里,它捕获的食物和饮用的海水,含盐量很高,海龟有一个天然“海水淡化器”——盐腺,它生在海龟的眼睛附近。海龟通过盐腺把多余的盐分从体内排出。排盐时,看上去就像流泪似的。 It was discovered that after a long journey of thousands of kilometers, the turtles looked around and shed tears as they returned to where they were originally laying eggs. People can not help but ask: Is it because of tears thrown back excitedly? People also found that it is also constantly shed tears while laying eggs, is not suffering from eggs? Researchers have found that the original turtle living in the sea, it captured The food and drinking seawater, salty, sea turtles have a natural “seawater desalination” - salt glands, it is born near the eyes of sea turtles. Turtles drain excess salt through the salt glands. When salt is drained, it looks like tears.