Much of this movement is to regulate the contents of the cell. This includes bringing material into the cell from the extracellular environment or the plasma membrane (endocytosis) or releasing material made within the the cell to the outside (exocytosis).
It really is an easy project...it just takes a little time. All and all, it took me about 6-8 total hours to make 4 bouquets, 10 bouts (my mom made those though) and about 15 centerpieces. I made two bouquets the day before our wedding and the other two the day of the wedding.
I just spoke to my hairdresser this week, and she recommended the hair trial be around 3 - 4 weeks before the wedding date so that she would be less likely to forget details of what she did (I want a low updo). I have also worked out a schedule for my highlights--she said a week before the wedding is optimal. I haven't figured out a makeup artist yet (there's one not too far from the hair salon that my photographer recommended), but I may not have the requisite number of girls who want makeup done.