abdomen (ab-do´men, ab´do-men) [NA]

The part of the trunk that lies between the thorax and the pelvis. The a. does not include the vertebral region posteriorly but is considered by some anatomists to include the pelvis (abdominopelvic cavity). It includes the greater part of the abdominal cavity (cavum abdominis [NA]), and is divided by arbitrary planes into nine regions. See also abdominal regions, under region.venter (1); [L. abdomen, etym. uncertain]
acute a. any serious acute intra-abdominal condition (such as appendicitis) attended by pain, tenderness, and muscular rigidity, and for which emergency surgery must be considered.surgical a;
boat-shaped a. scaphoid a
carinate a. a sloping of the sides with prominence of the central line of the a.
navicular a. scaphoid a
a. obsti´pum rarely used term for deformity of the a. due to congenitally short rectus muscles.
pendulous a. an a. with greatly relaxed walls that sag down over the pubic region.
protuberant a. unusual or prominent convexity of the a., due to excessive subcutaneous fat, poor muscle tone, or an increase in intra-abdominal content.
scaphoid a. a condition in which the anterior abdominal wall is sunken and presents a concave rather than a convex contour.boat-shaped a., navicular a;
surgical a. acute a


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