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从开始双足直立行走的阿法南方古猿,到今天飞天入海去太空的人粪,数百万年的演化让我们人类的身体发生了极大的变化!不过,有些变化似乎不太彻底,这是怎么回事呢?瞬膜一些动物(无尾两栖类、爬行类、鸟类)的眼部除上、下眼睑外,还有一层透明的眼睑——瞬膜,能遮住角膜以保护眼球。人类的瞬膜早经退化,但还残留有痕迹——半月皱襞,就在眼角的泪阜附近。尾骨现代人类早已没有尾巴,但仍保留着尾骨,喏,就在脊柱最下端,由3至5块尾椎接合而成。不再负责连接尾巴的尾骨其实也很有用——它是很多肌肉的附着之处,也是人体骨骼的承重点之一。
The evolution of millions of years has taken a dramatic turn for the better part of our human body, from the beginning of the albion Australopithecus, who walked erect upright to the sky to the sea today, flying into space. However, some changes seem less thorough, This is how the case? Instantaneous membrane Some animals (amphibians, reptiles, birds) in addition to the upper and lower eyelids, there is a layer of transparent eyelids - instantaneous membrane, can cover the cornea to protect eyeball. Homo sapiens instantaneous degeneration of the film, but there are still traces - half-fold folds, in the corner of the tear Fu near. Coccyx Modern humans have long tail, but still retain the coccyx, 喏, at the bottom of the spine, from 3 to 5 coccyx joints formed. The coccyx, which is no longer responsible for connecting the tails, is actually very useful - it’s a lot of muscle attachment and one of the bones of the body.