from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Either of two mesenteries attached to the embryonic stomach that persist in the form of ligaments and the lesser omentum.
from The Century Dictionary.
- noun In human anat, the umbilical region of the abdomen, between the epigastrium above and the hypogastrium or epipubic region below. See cut under
- noun In anatomy and zoology, the mesentery of the stomach; the fold of peritoneum which holds the stomach in place.
from the GNU version of the Collaborative International Dictionary of English.
- noun The umbilical region.
- noun The mesogaster.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy The part of the
embryonic mesenterythat includes the stomach
Sorry, no etymologies found.
The lesser omentum is formed, as indicated above, by a thinning of the mesoderm or ventral mesogastrium, which attaches the stomach and duodenum to the anterior abdominal wall.
Its dorsal part or greater curvature, to which the dorsal mesogastrium is attached, grows much more rapidly than its ventral part or lesser curvature to which the ventral mesogastrium is fixed.
The spleen appears about the fifth week as a localized thickening of the mesoderm in the dorsal mesogastrium above the tail of the pancreas.
Schematic and enlarged cross-section through the body of a human embryo in the region of the mesogastrium.
As the liver undergoes enlargement, both it and the ventral mesogastrium of the fore-gut are gradually differentiated from the septum transversum; and from the under surface of the latter the liver projects downward into the abdominal cavity.
By the growth of the liver the ventral mesogastrium is divided into two parts, of which the anterior forms the falciform and coronary ligaments, and the posterior the lesser omentum.
At first the pancreas is directed upward and backward between the two layers of the dorsal mesogastrium, which give to it a complete peritoneal investment, and its surfaces look to the right and left.
With the change in the position of the stomach the dorsal mesogastrium is drawn downward and to the left, and the right side of the pancreas is directed backward and the left forward (Fig. 1103).
The former arises as a diverticulum from the dorsal aspect of the duodenum a short distance above the hepatic diverticulum, and, growing upward and backward into the dorsal mesogastrium, forms a part of the head and uncinate process and the whole of the body and tail of the pancreas.
The part of the dorsal mesogastrium which intervened between the spleen and the greater curvature of the stomach forms the gastrosplenic ligament.