Compare the abdominal regions and abdominal quadrants?

It is like a tic-tac-toe game. The middle section is called the umbilical region. Then, from the upper left around in a clockwise manner we have: Right hypochondriac Epigastric Left hypochondriac...

part of the colon

Quadrant refers to a fourth, but if you mean top half then it includes the heart, the lungs, the esophagus, the stomach, the pancreas, and the thymus (found mostly in children, it shrinks as you get...

hypogastric

Iliac region