Abdominal pain is simply pain felt in the abdomen — the belly area between the chest and the pelvis. It is one of the most common reasons people see a doctor. The cause can be as mild and ordinary as indigestion, or it can point to a more serious disorder, which is why the same symptom can mean very different things.

What causes it

Because the abdomen holds so many organs — the stomach, intestines, liver, gallbladder, pancreas, kidneys, and more — abdominal pain has a very wide range of possible causes. Common ones include:

• Indigestion and gas — often after eating, usually harmless
• Constipation — a build-up of stool in the bowel
• Stomach or intestinal infections — such as gastroenteritis
• Menstrual cramps — in the lower abdomen
• Trapped wind or bloating

More serious causes can include:

• Appendicitis — inflammation of the appendix, often felt in the lower right belly
• Gallstones — typically pain in the upper right area
• Kidney stones — sharp pain that may spread to the back or groin
• Bowel obstruction or other emergencies

Reading the clues

Doctors learn a lot from where the pain is, how it feels, and what comes with it. They often ask about:

• Location — upper, lower, left, right, or all over
• Character — sharp, dull, cramping, burning, or constant
• Timing — sudden or gradual, and whether it’s linked to eating
• Other symptoms — fever, vomiting, diarrhoea, blood, or changes in bowel habits

These details help separate everyday indigestion from something that needs urgent care.

When to be concerned

Most abdominal pain is mild and passes on its own. But certain warning signs suggest a problem that needs prompt medical attention, such as:

• Severe or rapidly worsening pain
• A hard, rigid, or very tender belly
• Pain with high fever, persistent vomiting, or blood in vomit or stool
• Pain after an injury to the abdomen
• Pain with chest symptoms, dizziness, or fainting

Why it matters

Abdominal pain is the body’s general alarm for the belly region. Because that single signal can come from dozens of sources — trivial to life-threatening — it should never be automatically dismissed or automatically panicked over. The sensible approach is to watch for the warning signs above and seek professional assessment when they appear.

Disclaimer

This content is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Abdominal pain can range from harmless to genuinely dangerous, and only a qualified healthcare professional can determine the cause in your specific case. If you experience severe, sudden, or persistent abdominal pain — especially with fever, vomiting, blood, or a rigid, tender belly — seek medical care promptly or call your local emergency number. Always consult a doctor about your own health.

Abdominal distension is a condition in which the abdomen (the belly) becomes stretched, swollen, or enlarged because of a build-up of gas or fluid inside it. In everyday language, people often describe it as feeling “bloated” or noticing that their belly looks visibly bigger or tighter than usual.

The key idea is that the belly is being physically pushed outward by something accumulating inside — most commonly trapped gas, but sometimes fluid or other contents.

What causes it

Abdominal distension has many possible causes, ranging from mild and temporary to more serious. Common ones include:

• Gas build-up — from swallowed air, certain foods, or digestion problems
• Constipation — a build-up of stool in the intestines
• Fluid accumulation (ascites) — fluid collecting in the abdominal cavity, which can be linked to liver, heart, or kidney conditions
• Digestive disorders — such as irritable bowel syndrome (IBS) or food intolerances
• Blockage — a partial or complete obstruction in the intestines
• Other causes — including pregnancy, which naturally enlarges the abdomen

How it feels

Depending on the cause, abdominal distension may come with:

• A tight, full, or stretched sensation in the belly
• Visible swelling or an increase in belly size
• Discomfort or pain
• Excess gas, burping, or changes in bowel habits

Mild, occasional bloating after a large meal is usually harmless. Distension that is persistent, painful, or rapidly worsening is more concerning.

Why it matters in medicine

Doctors pay attention to abdominal distension because it can be a clue to what’s happening inside the body. The two main culprits — gas and fluid — point in very different directions: trapped gas often relates to digestion, while fluid build-up can signal an underlying problem with an organ such as the liver. By examining the belly (sometimes tapping it to tell gas from fluid) and using scans, doctors can work out the cause and the right treatment.

Disclaimer

This content is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. While occasional bloating is common and usually harmless, persistent, severe, or sudden abdominal distension — especially with pain, vomiting, fever, or an inability to pass gas or stool — can signal a serious condition and should be assessed by a doctor. If symptoms are severe or rapidly worsening, seek medical care promptly or call your local emergency number. Always consult a qualified healthcare professional about your own health.

The abdominal cavity is the hollow space inside your body that sits below the chest. It’s the internal “room” that holds and protects many of your vital organs — essentially the inside of what people call the belly.

It is separated from the chest cavity above it by the diaphragm, the dome-shaped breathing muscle. Below, it opens into the pelvic cavity. So you can think of it as the large internal space between the breathing muscle and the pelvis.

What it holds

The abdominal cavity contains and cushions several organs essential for digestion and filtering, including:

• Stomach
• Small and large intestines
• Liver
• Gallbladder
• Pancreas
• Spleen
• Kidneys

These organs are not loose inside the cavity — they are held in place and protected by a smooth membrane lining called the peritoneum, which also lets them glide against one another as you move and breathe.

Why it matters

The cavity does more than just store organs. Its walls — made of muscle (including the abdominal muscles) and supported by the spine at the back — protect the soft organs inside from injury. The space also allows the organs room to expand and work, such as when the stomach fills after a meal or the intestines move food along.

In medicine, the abdominal cavity is important for many procedures and diagnoses. For example, fluid can sometimes build up inside it (a condition called ascites), and surgeons frequently operate within it — increasingly through small keyhole incisions in a technique called laparoscopy.

A note on related terms

The abdominal cavity is part of a larger continuous space sometimes called the abdominopelvic cavity, which combines the abdominal cavity with the pelvic cavity below it. You may also encounter the term peritoneal cavity, which refers more precisely to the space lined by the peritoneum membrane.

Disclaimer

This content is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Conditions affecting the abdominal cavity and its organs can range from minor to serious. If you have concerns about abdominal symptoms — such as pain, swelling, or bloating — consult a qualified healthcare professional, or in an emergency, call your local emergency number.

The abdominal aorta is a major section of the body’s largest artery, the aorta. Specifically, it is the part of the aorta that runs through the abdomen — beginning at the diaphragm (the breathing muscle beneath the lungs) and ending where the aorta splits into the two iliac arteries that carry blood down into the legs.

To picture it: the aorta leaves the heart, arches over, travels down through the chest, passes through the diaphragm into the belly (this is where the abdominal aorta begins), and finally divides in the lower abdomen like the trunk of a tree branching in two.

What it does

The aorta is the main highway for oxygen-rich blood leaving the heart, and the abdominal portion is responsible for supplying blood to the organs and structures of the lower body. Branches coming off the abdominal aorta feed:

• The stomach, liver, and spleen
• The intestines
• The kidneys
• And, via the iliac arteries, the pelvis and legs

Because it carries such a large volume of blood under high pressure, the abdominal aorta is one of the most important blood vessels in the entire body.

Why it matters in medicine

The abdominal aorta is clinically significant because of a serious condition called an abdominal aortic aneurysm (AAA) — a weakening and bulging of the vessel wall. If an aneurysm grows large and bursts, it causes life-threatening internal bleeding. This is why doctors sometimes screen for AAAs, especially in older adults, and why sudden, severe abdominal or back pain is taken seriously.

Its location also makes it a key landmark in imaging scans (such as ultrasound and CT) and in certain surgeries.

How it fits together

It helps to think of the aorta in named sections along its path:

1. Ascending aorta → rises out of the heart
2. Aortic arch → curves over the top
3. Thoracic (descending) aorta → runs down through the chest
4. Abdominal aorta → the belly portion, from diaphragm to the iliac split
5. Iliac arteries → the two branches heading into the legs

The abdominal aorta is simply the stretch that does its work inside the abdomen.

Disclaimer

This content is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Conditions affecting the abdominal aorta, such as an aneurysm, can be very serious and require expert medical evaluation. If you experience sudden, severe pain in the abdomen or back, a pulsating feeling in your belly, or other concerning symptoms, seek medical care immediately or call your local emergency number. Always consult a qualified healthcare professional about your own health.

Abdominal is an adjective meaning “located in the abdomen” or “relating to the abdomen” — the belly region of your body that holds the stomach, intestines, liver, and other vital organs. Whenever something is described as abdominal, it concerns that part of the body between the chest and the pelvis.

The word is built from the root abdomin- (“abdomen”) plus the ending -al (“relating to”), so it literally means “of the belly.”

How it’s used

You’ll hear “abdominal” attached to many everyday and medical terms. A few common examples:

• abdominal pain → pain felt in the belly area
• abdominal muscles → the muscles of the belly wall (often shortened to “abs”)
• abdominal surgery → an operation performed on organs inside the abdomen
• abdominal cavity → the internal space that contains the abdominal organs
• abdominal cramps → tightening, gripping pains in the belly

Why the word matters

In medicine, being able to label something as “abdominal” immediately narrows down where a problem is. If a doctor notes “abdominal tenderness,” everyone on the care team knows the issue is in the belly rather than the chest, back, or limbs. It’s a simple word that carries precise locational meaning — which is exactly why it appears so often in medical notes, symptom descriptions, and everyday health conversations.

A note on related words

“Abdominal” sits alongside other terms from the same root, such as the noun abdomen itself and the prefixes abdomin- and abdomino-. Recognizing this family of words makes it easier to understand longer medical terms like abdominoplasty (a “tummy tuck”) or abdominopelvic (relating to both the abdomen and pelvis).

Disclaimer

This content is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Abdominal symptoms such as pain, swelling, or cramps can have many different causes, ranging from minor to serious. If you experience severe, sudden, or persistent abdominal symptoms, consult a qualified healthcare professional or, in an emergency, call your local emergency number.

abdomin- is a prefix — a building block placed at the front of a word — meaning “relating to the abdomen” (the belly, the body cavity holding the stomach, intestines, liver, and other organs). It is simply a shortened form of abdomino-, used specifically before a vowel to make the resulting word easier to say.

The spelling rule

This is a small but tidy rule of medical word-building:

• Use abdomino- before a consonant
• Use abdomin- before a vowel

Dropping the final “o” before a vowel keeps the word from having two awkward vowel sounds clashing together. For example:

• abdominopelvic → before the consonant “p”, the full form is kept
• abdominal → before the vowel “a”, the “o” is dropped

Both forms point to exactly the same thing: the abdomen.

How it’s used

When you see “abdomin-” (or “abdomino-“) at the start of a medical term, you know the word concerns the belly region. Common examples include:

• abdominal → relating to the abdomen (as in abdominal pain or abdominal muscles)
• abdominoplasty → a surgical “tummy tuck” to reshape the abdomen
• abdominocentesis → drawing fluid from the abdominal cavity with a needle

Why prefixes like this are worth knowing

Medical vocabulary is built from a relatively small set of these recurring roots and prefixes. Once you recognize that “abdomin-/abdomino-” means “abdomen,” you can decode the general meaning of long, intimidating-looking terms without memorizing each one individually — a handy shortcut for students, patients, and anyone curious about how medical words are put together.

Disclaimer

This content is for general educational purposes only and is intended to explain medical terminology, not to provide medical advice, diagnosis, or treatment. Understanding what a prefix means does not qualify anyone to interpret a diagnosis or medical report. If you encounter these terms in your own medical records or have questions about a procedure or condition, always consult a qualified healthcare professional.

The abdomen is the space inside your body that most people simply call the “belly” or “tummy.” In anatomical terms, it sits below the diaphragm (the breathing muscle under your lungs), above the pelvis, and in front of the spine. It’s a large internal cavity that houses many of your most important organs.

What’s inside

The abdomen contains several vital organs that handle digestion, filtering, and other essential jobs, including:

• Stomach — breaks down the food you eat
• Intestines — the small and large intestines, where nutrients are absorbed and waste is formed
• Liver — filters the blood and processes nutrients and toxins
• Other organs — such as the pancreas, spleen, gallbladder, and kidneys

Because so much happens here, “pain in the abdomen” (abdominal pain) is one of the most common complaints people bring to a doctor — and its causes range from the harmless to the serious.

How doctors map the abdomen

To describe exactly where a symptom is, doctors divide the abdomen into nine regions, like a tic-tac-toe grid laid over the belly. This shared map lets any clinician pinpoint and communicate a location precisely.

Top row:

• Right hypochondriac region
• Epigastrium (centre, just below the breastbone)
• Left hypochondriac region

Middle row:

• Right lumbar region
• Umbilical region (centre, around the navel)
• Left lumbar region

Bottom row:

• Right iliac region
• Hypogastrium (centre, lowest part)
• Left iliac region

So if a patient says “it hurts here” and points, the doctor can record it as, for example, the right iliac region — which is a classic location for appendicitis.

A note on related terms

In medical vocabulary, words referring to the abdomen often begin with coeli- or coelio- (from the Greek for “belly cavity”). For instance, coeliac relates to the abdominal region. Recognizing these roots can help you decode other medical terms you come across.

Disclaimer

This content is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Abdominal pain can have many causes, some of them minor and some genuinely serious (such as appendicitis or internal bleeding). If you experience severe, sudden, or persistent abdominal pain — especially with fever, vomiting, or a rigid, tender belly — seek medical care promptly or call your local emergency number.

ABC stands for Airway, Breathing, and Circulation — the three basic, life-saving checks made on a casualty (an injured or seriously ill person) in an emergency. It’s one of the most important memory aids in first aid and emergency medicine, giving rescuers a clear, ordered list of what to check first when every second counts.

The order is deliberate: it follows the things that will kill a person fastest. A blocked airway can be fatal within minutes, so it’s checked before breathing, which in turn is checked before circulation.

What each letter means

• A — Airway Is the path for air into the lungs clear? The rescuer checks that nothing — the tongue, vomit, a foreign object — is blocking the airway, and opens it if needed (often by gently tilting the head back and lifting the chin).
• B — Breathing Is the person actually breathing? The rescuer looks for the chest rising and falling, listens for breath, and feels for air. If breathing has stopped, rescue breaths or CPR may be needed.
• C — Circulation Is blood moving around the body? The rescuer looks for signs of life and serious bleeding. If the heart isn’t pumping effectively, chest compressions (CPR) are started; heavy bleeding is controlled with pressure.

Why the order matters

The genius of ABC is its simplicity under pressure. In a frightening, chaotic moment, a single short word tells a rescuer exactly what to check and in what order, so that the most immediately deadly problems are dealt with first. Clear an airway, restore breathing, support circulation — in that sequence.

A note on variations

You may come across slightly extended versions. DRABC (or DR ABC) adds two steps at the front:

• D — Danger → make sure the scene is safe for you and the casualty before approaching.
• R — Response → check whether the person is conscious and responsive.

Some modern guidelines also use CAB (Circulation first) for certain cardiac-arrest situations, or add a D and E for Disability and Exposure in hospital settings. The exact letters can vary, but the goal is always the same: a quick, ordered check of the things most likely to take a life.

Disclaimer

This content is for general educational purposes only and is not a substitute for proper, hands-on first aid training. Reading about ABC is not the same as being trained to perform it. To act safely and effectively in an emergency, take an accredited first aid or CPR course. In a real emergency, call your local emergency number immediately (such as 112 in Turkey and across Europe, 999 in the UK, or 911 in the US) before or while giving first aid.

ab- is a prefix — a small piece added to the front of a word to change its meaning. It comes from Latin and carries the basic sense of “away from,” “off,” or “out of.” When you see “ab-” at the start of a word, it often signals movement or direction away from something.

How it’s used

In medicine and everyday English alike, “ab-” tends to mark something moving away, departing from the normal, or separating from a center. A few clear examples:

• abduction → moving a body part away from the midline of the body (e.g., raising your arm out to the side). Its opposite is adduction, moving toward the midline.
• abnormal → away from what is normal or typical.
• absent → away, not present.
• abduct → to lead or carry away.
• aberrant → wandering away from the usual or expected path.

A useful contrast

It helps to compare “ab-” with its near-opposite, ad- (“toward”):

• abduction = movement away from the body’s center
• adduction = movement toward the body’s center

Just one letter changes the direction completely — which is exactly why these prefixes matter so much in anatomy and medicine, where precise direction can change the entire meaning of a term.

Why prefixes like this are worth knowing

Once you recognize that “ab-” means “away from,” you can often work out the rough meaning of an unfamiliar word without a dictionary. This is especially handy in medical and scientific vocabulary, where the same Latin and Greek building blocks appear over and over again.

Your blood type comes from tiny markers, called antigens, that sit on the surface of your red blood cells. If you are type AB, your red cells carry both the A antigen and the B antigen.

The ABO system divides everyone into four groups based on which of these markers they have:

• A → has the A marker
• B → has the B marker
• AB → has both markers
• O → has neither marker

Type AB is the rarest of the four groups in most populations.

Why your type matters

Your immune system treats your own markers as “friendly” and attacks any marker it doesn’t recognize. Because type AB people already carry both the A and B markers, their bodies don’t see either of them as a threat. This is what makes AB special: there are no A or B markers on incoming blood that an AB person’s body would attack.

Giving and receiving blood (type AB)

You can donate to:

• Type AB only (same group)

Because AB blood carries both markers, anyone who is not AB would react against at least one of them — so AB can only safely give to fellow AB people.

You can receive from:

• Type O, A, B, and AB — in other words, every ABO group

This is why type AB is often called the “universal recipient”: since the body accepts both A and B markers, it can take red blood cells from any ABO group.

The underlying rule stays the same throughout: you can only receive blood that doesn’t introduce a marker your body would attack — and AB attacks neither A nor B.

One thing to keep in mind

This explanation covers the ABO system only. In real medicine, doctors also check the Rh factor (the “+” or “−” in types like AB+ or AB−), and blood is always cross-matched in a lab before any transfusion. Also note that the “universal recipient” idea applies to red blood cells — for plasma the compatibility actually runs the opposite way. So “type AB” is the start of the picture, not the whole story.

Disclaimer

This content is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Blood typing and transfusion decisions must always be made by qualified healthcare professionals using laboratory testing and cross-matching. Never rely on this information to determine your own blood type or transfusion compatibility. If you have questions about your blood type, donating blood, or receiving a transfusion, consult a doctor or a certified blood bank.