Discussion»Questions»Life and Society» What are some objects that should only and always be a certain color? Please name both the object and the color, thanks. ~
In humans the oxygen is bound to hemoglobin, a molecule that contains iron and beeing red gives that colour to the blood. In spiders, and in many other arthropods (as crustaceans) and also in most mollusks the oxygen is bound to a different molecule called hemocyanin that contains copper instead of iron.
The hemocyanins are proteins colourless in the reduced or deoxygenated state but the oxydized copper beeing blue/green, gives that colour to the oxygenated blood. Therefore...spiders have "blue" blood...
Edit---added bold type.
This post was edited by tom jackson at February 21, 2018 12:30 PM MST