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.

tissue

explanation:

it is actually formed by geoup of cells which is tissue

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.