Mostly yes, it might be on second thought.
Yes, they all do.
A spider has transparent blood
No (well I dont think so)
Insects, Spiders, etc. Do your research. This is coming from a 12 year old in science class.
Spiders have blue blood. In human blood oxygen is bound to hemoglobin which contains iron, giving it the blood a red color. In spiders, as well as other Arthropods and Molluscs, oxygen is bound to...