What Areas Do Core Exercises Work?

I did my new core workout today and it "seemed" easy. I started off with beginner exercises working different parts of my core. The superman works the deep abs and the lower back; the bridge works the glutes and hamstrings; metronome the obliques (sides); plank works the deep abs and lower back; and finally, the side plank works the obliques, deep abs, lower back, and glutes. Since this routine doesn't include crunches, I am going to add some crunches into my strength training workout. I have made some adjustments to my schedule as I add on pieces--you'll get an update at the end of the week.