unicode said: No, they do not have blood, what they have is hemolymph, a similar but different thing.
Hemolymph is just a more accurate expression. Yes, it's a bit different as it doesn't transport oxygen, only nutrients, but it still does circulate using "heart" (dorsal vessel) and certain insect species even use it for hemocytal oxygen transfer. But that's already a quibble, let's stop here.
