The space above your belly button contains a dense cluster of vital organs, including the stomach, liver, gallbladder, spleen, pancreas, and portions of the intestines, all protected by the muscular abdominal wall and capped overhead by the dome-shaped diaphragm. This upper abdominal region is sometimes called the “supraumbilical” area, and it is one of the most organ-rich zones in the entire body. Understanding what lives up there, how the pieces fit together, and why you might feel pain in one spot when the source is somewhere else entirely can help you make better sense of your own anatomy.
The Stomach
The stomach sits in the upper left portion of your abdomen, tucked under the left side of your rib cage. It is a hollow organ shaped roughly like a J, and its uppermost section, called the fundus, arches above the point where the esophagus connects to it. Below that dome is the body of the stomach, which is the largest section and the part that receives food when you swallow. The lower end narrows into the pylorus, a muscular channel that terminates in a strong ring of muscle called the pyloric sphincter. That sphincter acts as a gatekeeper, holding food inside the stomach while it gets broken down, then releasing it in controlled pulses into the first segment of the small intestine.1Int J Cadaver Stud Ant Var. A New Look at the Gross Anatomy of the Stomach to Understand How It Functions
The stomach’s position explains why pain from gastritis, ulcers, or acid reflux tends to register in the upper-left or upper-center area of the abdomen, just below the breastbone. It is worth noting that the stomach is not fixed rigidly in place. It shifts somewhat with body position, breathing, and how full it is, which is why the exact spot where you feel stomach-related discomfort can vary from meal to meal.
The Liver and Gallbladder
The liver occupies most of the right upper quadrant of your abdomen, sitting snugly beneath the right side of the diaphragm and extending slightly across the midline.2ScienceDirect. Comparative Anatomy and Histology It is the largest solid organ in the body, weighing roughly three pounds in an average adult. Among its many jobs are filtering blood from the digestive tract, producing bile to help digest fats, storing glycogen for energy, and breaking down drugs and toxins.
Nestled against the underside of the liver is the gallbladder, a small, pear-shaped sac that stores and concentrates bile. When you eat a fatty meal, the gallbladder contracts to squirt bile into the duodenum through the common bile duct. Gallstones can form when bile components crystallize, and because the gallbladder sits high on the right side, gallstone pain often presents in the upper-right abdomen, sometimes radiating toward the right shoulder blade. This location, directly above and to the right of the belly button, is one of the most common sites of acute abdominal pain in adults.
The Pancreas and Spleen
The pancreas is an elongated, somewhat flat organ that sits behind the stomach, pressed against the back wall of the abdominal cavity. Anatomists describe it as “retroperitoneal,” meaning it lies behind the membrane that lines most of the abdominal organs. It stretches roughly horizontally across the upper abdomen, with its head cradled in the curve of the duodenum on the right and its tail pointing toward the spleen on the left.3Surgery (Oxford). Anatomy of the pancreas and spleen The pancreas has two major jobs: producing digestive enzymes that help break down proteins, fats, and carbohydrates, and secreting hormones like insulin and glucagon that regulate blood sugar.
The spleen is the largest lymphoid organ in the body and sits deep in the left upper quadrant, behind the stomach and just under the left side of the diaphragm.4Surgery (Oxford). Basic Science Anatomy of the pancreas and spleen It is a soft, dark-purple organ with a smooth surface, and it is surprisingly fragile.5Surgery (Oxford). Basic Science Anatomy of the pancreas and spleen Its primary roles involve filtering old or damaged red blood cells out of the bloodstream and helping mount immune responses. Because it stores a significant volume of blood, a ruptured spleen from trauma can cause life-threatening internal bleeding. The spleen is held in place partly by ligaments that connect it to the stomach and the left kidney, and its position under the rib cage gives it some bony protection.
The Duodenum and Transverse Colon
Directly below the stomach, the duodenum forms the first stretch of the small intestine. Despite being the shortest segment of the small bowel, spanning only about 20 to 30 centimeters, the duodenum is the initial meeting point for food leaving the stomach, bile from the liver and gallbladder, and digestive enzymes from the pancreas. This makes it a critical hub for digestion and nutrient absorption.6ScienceDirect. Chapter 68 – Anatomy and Physiology of the Duodenum The duodenum curves in a C-shape around the head of the pancreas, and ulcers here are at least as common as stomach ulcers, often causing pain in the upper-center abdomen that sometimes improves with eating.
Running horizontally across the upper abdomen, roughly at or just above the level of the belly button, is the transverse colon. It is the longest segment of the large intestine, stretching from the right side of the abdomen near the liver over to the left side near the spleen. Unlike the ascending and descending sections of the colon, which are relatively fixed to the back wall, the transverse colon is quite mobile, suspended by a fan-shaped sheet of tissue called the transverse mesocolon that anchors it to the back of the abdominal cavity. A ligament also connects the transverse colon to the greater curvature of the stomach above it.7PubMed Central. A siphon-like retrogastric transverse colon: A case report Bloating or gas trapped in the transverse colon can produce discomfort that feels like it is coming from the stomach or even the chest, which can be confusing.
The Diaphragm
The diaphragm forms the ceiling of the upper abdominal cavity and the floor of the chest cavity. It is a broad, dome-shaped muscle with a central tendon, and it is the main muscle of breathing. When it contracts, it flattens downward, pulling air into the lungs. When it relaxes, it rises back into its dome shape, pushing air out. Its peripheral edges attach to the lower ribs, the xiphoid process at the bottom of the breastbone, and the upper lumbar vertebrae.8PubMed. Anatomy, Abdomen and Pelvis: Diaphragm
Although the diaphragm is a continuous sheet, it has three important openings that let structures pass between the chest and the abdomen. The largest vein in the body, the inferior vena cava, passes through an opening in the central tendon. The esophagus passes through a gap in the muscular portion near the right side, and the aorta passes between the two muscular pillars at the back. These openings are clinically relevant: a hiatal hernia, for instance, occurs when part of the stomach pushes up through the esophageal opening into the chest cavity, which can cause heartburn and difficulty swallowing.8PubMed. Anatomy, Abdomen and Pelvis: Diaphragm
Blood Vessels and Nerve Networks
The abdominal aorta, the body’s largest artery, runs down the back wall of the abdomen just in front of the spine. Shortly after passing through the diaphragm, it branches into the celiac trunk, which is the primary blood supply for the stomach, liver, spleen, and part of the pancreas and duodenum. In a classic anatomy textbook, the celiac trunk splits neatly into three arteries: the common hepatic (to the liver), the left gastric (to the stomach), and the splenic (to the spleen). In practice, cadaver studies show that this tidy three-way split occurs in fewer than half of people, with many individuals showing additional branches or different branching patterns.9PubMed Central. The Celiac Trunk and Its Anatomical Variations: A Cadaveric Study These variations are usually harmless but matter a great deal to surgeons operating in the area.
Wrapped around the root of the celiac trunk is the celiac plexus, a dense web of autonomic nerves that relays pain and functional signals from the upper abdominal organs to the brain.10PubMed Central. Celiac Plexus Block and Neurolysis in the Management of Chronic Upper Abdominal Pain The plexus receives input from the greater splanchnic nerves and the vagus nerve, and it plays a role in regulating digestion, blood flow to the gut, and pain perception.11PubMed. Contribution to the variability in the coeliac plexus structure and formation When chronic upper abdominal pain becomes difficult to treat with medication, doctors sometimes perform a celiac plexus block, injecting anesthetic or a neurolytic agent near this nerve cluster to interrupt pain signals.
The Peritoneum and the Omentum
Most of the organs above the belly button are draped in or connected by the peritoneum, a thin, slippery membrane that lines the inside of the abdominal wall and folds around the organs. The peritoneum produces a small amount of lubricating fluid that allows organs to slide against each other without friction during breathing or digestion.
Two important folds of peritoneum deserve mention. The greater omentum is a large, fatty, apron-like sheet that hangs from the greater curvature of the stomach and drapes over the intestines. It acts as a physical barrier and an immune sentinel: it can migrate toward areas of infection or inflammation and wall them off, which is why surgeons sometimes find the omentum stuck to an inflamed appendix or a perforated ulcer. The lesser omentum is a smaller fold connecting the liver to the stomach and the first part of the duodenum. Together, these peritoneal reflections serve as both boundaries for disease processes and as conduits through which infection or cancer can spread within the abdominal cavity.12PubMed. Greater and lesser omenta: normal anatomy and pathologic processes
The Abdominal Wall Itself
The organs above the belly button are held in and protected by multiple layers of muscle, connective tissue, and skin. The most visible muscle group is the rectus abdominis, the paired “six-pack” muscles that run vertically on either side of the midline. Between those two muscles lies the linea alba, a fibrous band of connective tissue. Studies using both dissection and imaging show that the linea alba is widest at the level of the belly button and narrowest below it, closer to the pubic bone.13PubMed Central. The Anatomy of the Human Linea Alba: A Systematic Review and Meta-analysis The linea alba is not just a passive seam: its fibers run in multiple directions, including two oblique angles and one transverse direction, creating a woven structure that resists stretching and tearing.
Flanking the rectus muscles are three layers of lateral abdominal muscles: the external oblique, the internal oblique, and the transversus abdominis. Their fibers run at different angles, reinforcing each other and creating a strong, flexible wall. This layered architecture lets you bend, twist, and brace your trunk while still keeping the organs inside where they belong.
Why Pain Above the Belly Button Can Be Misleading
One of the trickier aspects of upper abdominal anatomy is referred pain, where you feel discomfort in one place even though the source is somewhere else. The reason is that nerve fibers from different organs can converge on the same pathways in the spinal cord, so the brain has trouble telling exactly where the signal came from. Sensory input from the gallbladder and the gastrointestinal tract, for example, can converge onto the same spinal pathways as cardiac pain signals, meaning that a gallbladder attack can sometimes mimic a heart attack, and vice versa.14Comprehensive Physiology. Mechanisms of Cardiac Pain
Upper abdominal pain can originate from organs that are retroperitoneal and hard to localize, like the pancreas, which sits behind the stomach against the spine. Pancreatitis often causes pain that bores straight through to the back. Kidney problems can also refer pain to the upper flank, and a lower-lobe pneumonia can occasionally present as upper abdominal pain because the inflamed lung irritates the diaphragm, which shares nerve supply with parts of the abdomen. The practical takeaway is that the location of pain in the upper abdomen is a useful starting clue but not a reliable map to the specific organ involved.
Ultrasound is typically the first imaging tool used to sort out upper abdominal complaints, because it is widely available, radiation-free, and effective at visualizing the liver, gallbladder, kidneys, and pancreas. The addition of contrast agents has expanded what ultrasound can detect. CT scans are reserved for more complex situations, like severe trauma or cancer staging, because of their radiation exposure.15PubMed Central. Indications for abdominal imaging: When and what to choose?
Common Abdominal Wall Problems Above the Navel
Two wall-related conditions frequently show up in the supraumbilical zone. The first is diastasis recti, a condition in which the two rectus abdominis muscles separate along the linea alba without an actual tear in the connective tissue. It is most commonly associated with pregnancy, but it also occurs in people who gain significant abdominal weight or who have naturally weaker connective tissue. In people under 45, a separation of more than about 10 millimeters above the belly button or more than 27 millimeters at the navel itself is considered a diastasis.16PubMed. The abdominal linea alba: an anatomo-radiologic and biomechanical study Those thresholds are slightly wider in older adults. A recent review also identified a previously unrecognized anatomical variation in how the internal oblique muscle attaches to the rectus sheath, which may predispose some people to developing diastasis.17PubMed Central. Prevalence and risk factors for diastasis recti abdominis: a review and proposal of a new anatomical variation
The second is an epigastric hernia, where fat or sometimes a small piece of peritoneum pushes through a weak spot in the linea alba between the belly button and the breastbone. These hernias are usually small and may cause a visible bulge and intermittent pain, especially with straining or coughing. In children, an epigastric hernia sometimes coexists with diastasis recti, and deciding whether to repair one or both remains an open question surgically.18PubMed Central. Subcutaneous endoscopic surgery for plicating divarication of recti and epigastric hernia repair in a child
The Lymphatic System in the Upper Abdomen
Above and behind many of these organs runs a less visible but important network: the lymphatic system. Lymph nodes cluster around the major blood vessels and organ pedicles throughout the upper abdomen, filtering tissue fluid and mounting immune responses. At the back of the upper abdomen, near the spine, sits the cisterna chyli, a small sac-like structure at the lower end of the thoracic duct. It collects lymph draining from the abdominal and pelvic organs as well as the lower limbs, then channels it upward through the thoracic duct into the venous system near the left shoulder.19PubMed. The cisterna chyli: a systematic review of definition, prevalence, and anatomy The cisterna chyli also collects chyle, a milky fluid rich in fats absorbed from the intestines, making it a key link between digestion and the bloodstream.
When the Organs Are Not Where Expected
In rare cases, the usual left-right arrangement of abdominal organs is flipped or scrambled. In situs inversus, the entire layout is mirror-imaged: the liver sits on the left, the spleen on the right, and the stomach curves the opposite direction. This condition is uncommon but usually harmless on its own; the organs function normally, just from reversed positions. A more complex situation arises in situs ambiguus, where the organs end up in an inconsistent arrangement that is neither the normal layout nor a clean mirror image. Situs ambiguus carries a much higher risk of intestinal malrotation. In one imaging study, roughly 6 percent of patients with situs inversus had intestinal malrotation, compared to about 88 percent of those with situs ambiguus.20PubMed. Intestinal malrotation in patients with situs anomaly: Implication of the relative positions of the superior mesenteric artery and vein Malrotation matters because it can predispose to volvulus, a dangerous twisting of the intestine that cuts off blood supply.
These anatomical variations are uncommon enough that most people will never need to think about them, but they illustrate an important point: the textbook diagram of the abdomen is an idealized average, not a photograph. Everyone’s organs sit in slightly different positions, at slightly different angles, and with slightly different blood vessel arrangements. That normal variability is why imaging is so valuable when something goes wrong. It lets clinicians see where your organs actually are rather than relying on where they are “supposed” to be.