The crayfish have its nerve cord on the ventral side rather than on the dorsal side. The ventral side is under the Crayfishes' exoskeleton, as opposed to the dorsal side where the exoskeleton is . If it is attacked it will be from the dorsal side and the nerve cord would be snapped easier. The function of the nerve cord is that if it gets attacked by a predator they will go for the top and it will still be able to move.
Unfortunately this question is incomplete. Glycolysis occurs in the cytoplasm of prokaryotic cells and in the cytosol of eukaryotic cells. Cytosol is a liquid composed mainly of water with some ions and proteins that comprises the majority of the volume of a cell, and it holds the cell organelles. The cytosol is the site of most of the metabolic activity in the cell.
