Chapter 1 : clinicl anatomy of the pelvis

The cutaneous nerve supply of the anterior abdominal wall arises from the anterior rami of the thoracic and lumbar vertebrae.
The dermatomes of the significant structures on the anterior abdominal wall are :

xiphisternum : T7
umblicus: T10
symphysis pubis : L1

The blood supply is via the superior epigastric ( branch of internal thoracic artery ) and inferior epigastric artery ( branch of external illiac artery ) vessels.