Insect blood, properly called hemolymph, flows freely through the body cavity, but is moved from the abdomen to the head through what structure?

It passes through a structure called Ostia that makes the valved chambers for hemolymph to flow. From the Ostia into the aorta and then the hemolymph is flushed out in front of head.

i don't have a definite answer, but i would assume not based on my experiences with my friend when we both were taking a spanish course; however, it would probably still be to your benefit to look at what questions she received, just in case. a language course and a science course differ greatly, after all.