Human eyes have three conecell types, with each type dedicated to receiving either blue, green or red light.
人类拥有三种视锥细胞,每种细胞都有各自的用途,可用于接收蓝色光、绿色光或红色光。
2
But no cone cells were observed in 10 of the 17 species, while only one type of conecell appeared to be present in the other 7.
但是17种鲨鱼中有10种都没有视锥细胞,其他7种鲨鱼也都只具有一种单一的视锥细胞。
3
The scientists, who examined retinas of 17 different species of shark, discovered that the creatures had only one type of colour-sensitive cell, known as a conecell, in their eyes.