So the circulatory system transports nutrients, but relatively little oxygen. However, in both insects and other arthropods, as well as molluscs, hemolymph does contain
Does hemolymph carry carbon dioxide?
An "Open" Circulatory System: The Grasshopper
For this reason, insect "blood" is called hemolymph. ... In vertebrates, the circulatory system is responsible for transporting oxygen to all the tissues and removing carbon dioxide from them.
What is carried in the hemolymph?
Hemolymph is mostly water, but it also contains ions, carbohydrates, lipids, glycerol, amino acids, hormones, some cells and pigments.