Final answer:
The hypogastric region is the abdominal area inferior to all other regions; also known as the pelvic or pubic region, it is below the umbilical region and corresponds to parts of both left and right lower quadrants.
Step-by-step explanation:
The abdominal region that lies inferior to all other abdominal regions is the hypogastric region (E). This area is also commonly referred to as the pelvic or pubic region. In the detailed approach of dividing the abdominal regions, there are nine sections. The hypogastric region is found below the umbilical region and is sandwiched between the left and right iliac (inguinal) regions. When considering the simpler four-quadrant division used in medicine, this area corresponds to parts of both the left and right lower quadrants (B and C).