abdominal
Ventral
Visceral means pertaining to the viscera, or internal organs.
Generically, that would be "supra-abdominal".
Abdomino- refers to the abdomen which is the belly region.
The Epigastric Region
Upper thoracic region
Dorsal
The medical term for the anterior surface of the elbow is the "antecubital region."
The umbilicus is the medical term for the belly button or navel, which is located on the abdomen, not the chest.
The caudal area is the medical term meaning tail region, although in humans it may be called the coccygeal region. Cauda means tail, and coccyx is tailbone.
Epigastric is the medical term meaning above the stomach. It generally refers to the are of the abdomen found superior to the bellybutton.
Costovertebral is the medical term meaning pertaining to the spine and ribs.