Abdomen

abdominalabdominal musclesbellyabdomensabdominalshuman abdomenventerabdominal muscleabdominaabdominal organs
The abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates.wikipedia
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Midriff

midsectionmidriff exposureBelly
The abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates.
In fashion, the midriff is the human abdomen.

Pelvis

pelvicpelvic girdlehip
The abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. When the glottis is closed and the thorax and pelvis are fixed, they are integral in the cough, urination, defecation, childbirth, vomit, and singing functions.
The pelvis (plural pelves or pelvises) is either the lower part of the trunk of the human body between the abdomen and the thighs (sometimes also called pelvic region of the trunk) or the skeleton embedded in it (sometimes also called bony pelvis, or pelvic skeleton).

Thorax

chestthoracicpectoral
The abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. When the glottis is closed and the thorax and pelvis are fixed, they are integral in the cough, urination, defecation, childbirth, vomit, and singing functions.
The thorax or chest (from the Greek θώραξ thorax "breastplate, cuirass, corslet" via thorax) is a part of the anatomy of humans and various other animals located between the neck and the abdomen.

Torso

trunkupper bodytruncal
The abdomen is the frontal part of the abdominal segment of the trunk, the dorsal part of this segment being the back of the abdomen.
The torso includes: the thoracic segment of the trunk, the abdominal segment of the trunk, and the perineum.

Liver

hepaticliver protein synthesislivers
Organs such as the liver, its attached gallbladder, and the pancreas function in close association with the digestive tract and communicate with it via ducts.
In humans, it is located in the right upper quadrant of the abdomen, below the diaphragm.

Aorta

aorticaortic archaortic root
The spleen, kidneys, and adrenal glands also lie within the abdomen, along with many blood vessels including the aorta and inferior vena cava.
The aorta is the main artery in the human body, originating from the left ventricle of the heart and extending down to the abdomen, where it splits into two smaller arteries (the common iliac arteries).

Tagma (biology)

tagmatatagmaparts
In arthropods it is the posterior tagma of the body; it follows the thorax or cephalothorax.
Familiar examples are the head, the thorax, and the abdomen of insects.

Pancreas

pancreaticexocrine pancreashead of the pancreas
Organs such as the liver, its attached gallbladder, and the pancreas function in close association with the digestive tract and communicate with it via ducts.
The pancreas is an organ that in humans lies in the upper left part of the abdomen.

Cephalothorax

prosomacephalothoracicfovea
In arthropods it is the posterior tagma of the body; it follows the thorax or cephalothorax.
The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind.

Spleen

splenicsplenetichilum
The spleen, kidneys, and adrenal glands also lie within the abdomen, along with many blood vessels including the aorta and inferior vena cava.
In humans the spleen is purple in color and is in the left upper quadrant of the abdomen.

Peritoneum

peritonealintraperitonealparietal peritoneum
Finally, the abdomen contains an extensive membrane called the peritoneum.
This peritoneal lining of the cavity supports many of the abdominal organs and serves as a conduit for their blood vessels, lymphatic vessels, and nerves.

Abdominal external oblique muscle

obliqueexternal obliqueoblique muscle
They are, from the outside to the inside: external oblique, internal oblique, and transverse abdominal.
The external oblique is situated on the lateral and anterior parts of the abdomen.

Large intestine

coloncolorectallarge bowel
Hollow abdominal organs include the stomach, the small intestine, and the colon with its attached appendix.
It then continues as the colon ascending the abdomen, across the width of the abdominal cavity as the transverse colon, and then descending to the rectum and its endpoint at the anal canal.

Appendix (anatomy)

appendixvermiform appendixvermiform
Hollow abdominal organs include the stomach, the small intestine, and the colon with its attached appendix. The alimentary tract in the abdomen consists of the lower esophagus, the stomach, the duodenum, the jejunum, ileum, the cecum and the appendix, the ascending, transverse and descending colons, the sigmoid colon and the rectum.
The appendix is usually located in the lower right quadrant of the abdomen, near the right hip bone.

Linea alba (abdomen)

linea albaabdomenmidline
All of their fibers merge towards the midline and surround the rectus abdominis in a sheath before joining up on the opposite side at the linea alba.
The white line (linea alba) is a fibrous structure that runs down the midline of the abdomen in humans and other vertebrates.

Navel

umbilicusbelly buttonbellybutton
It originates at the pubic bone and is inserted into the linea alba halfway up to the navel.
The navel (clinically known as the umbilicus, colloquially known as the belly button, or tummy button) is a protruding, flat, or hollowed area on the abdomen at the attachment site of the umbilical cord.

Groin

inguinalcrotchinguinal region
In the region of the groin, the inguinal canal, a passage through the layers.
In human anatomy, the groin (the adjective is inguinal, as in inguinal canal) is the junctional area (also known as the inguinal region) between the abdomen and the thigh on either side of the pubic bone.

Thoracic diaphragm

diaphragmdiaphragmatichemidiaphragm
The abdomen stretches from the thorax at the thoracic diaphragm to the pelvis at the pelvic brim.
Assisting this function with muscular effort (called forced exhalation) involves the internal intercostal muscles used in conjunction with the abdominal muscles, which act as an antagonist paired with the diaphragm's contraction.

Urinary bladder

bladderfundusintravesical
Anatomists may consider the urinary bladder, uterus, fallopian tubes, and ovaries as either abdominal organs or as pelvic organs.
In infants and young children the urinary bladder is in the abdomen even when empty.

Transverse colon

transversecolon, transverseParts of transverse
The alimentary tract in the abdomen consists of the lower esophagus, the stomach, the duodenum, the jejunum, ileum, the cecum and the appendix, the ascending, transverse and descending colons, the sigmoid colon and the rectum.
It crosses the abdomen from the ascending colon at the hepatic or right colic flexure with a downward convexity to the descending colon where it curves sharply on itself beneath the lower end of the spleen forming the splenic or left colic flexure.

Inguinal hernia

inguinalscrotal herniahernia, inguinal
This is also where weakness can form, and cause inguinal hernias.
In men, indirect hernias follow the same route as the descending testes, which migrate from the abdomen into the scrotum during the development of the urinary and reproductive organs.

Descending colon

descendingcolon, descendingdescending iliac
The alimentary tract in the abdomen consists of the lower esophagus, the stomach, the duodenum, the jejunum, ileum, the cecum and the appendix, the ascending, transverse and descending colons, the sigmoid colon and the rectum.
The descending colon begins at the splenic flexure at the upper left part of the abdomen.

Abdominal trauma

abdominal injuriesabdominalabdominal injury
Abdominal trauma is an injury to the abdomen and can involve damage to the abdominal organs.
Abdominal trauma is an injury to the abdomen.

Pelvic brim

brim of the pelvis
The abdomen stretches from the thorax at the thoracic diaphragm to the pelvis at the pelvic brim.
The false pelvis, which is above that plane, is sometimes considered to be a part of the abdominal cavity, rather than a part of the pelvic cavity (see also Abdomen).

Urination

urinateurinatingmicturition
When the glottis is closed and the thorax and pelvis are fixed, they are integral in the cough, urination, defecation, childbirth, vomit, and singing functions.
Voluntary contraction of the abdominal muscles aids the expulsion of urine by increasing the pressure applied to the urinary bladder wall, but voiding can be initiated without straining even when the bladder is nearly empty.