Abdomen and pelvis anatomy
The abdomen lies between the diaphragm and the pelvic brim and contains most of the digestive organs, the kidneys and adrenal glands, and many vessels and nerves. The pelvis below it forms a bony ring that supports the trunk, connects it to the lower limbs and houses the bladder and reproductive organs.
Each page pairs a concise written explanation with a 3D view of the structure and its position.
Muscles of the abdomen and pelvis
Bones of the abdomen and pelvis
Organs and glands of the abdomen and pelvis
Blood vessels of the abdomen and pelvis
Common questions
What are the four abdominal quadrants?
Clinicians divide the abdomen by a vertical and a horizontal line through the navel into the right upper, left upper, right lower and left lower quadrants to describe the location of pain or findings.
Which muscles form the anterior abdominal wall?
The rectus abdominis lies in front, flanked by three flat muscles: the external oblique, internal oblique and transversus abdominis.