Abdominal organs and celiac trunk week 1 Flashcards
What 2 layers are the peritoneum divided into? (just list)
parietal layer (paries=wall)
visceral layer (viscus=organ)
Where is the parietal peritoneum?
What organs does it cover?
What type of innervation does it receive? (somatic or visceral)
What nerves innervate the parietal peritoneum?
The Parietal (paries = wall) layer lines the body wall and covers the retroperitoneal organs on one surface. Parietal peritoneum is very sensitive to somatic pain and is innervated by the lower intercostal nerves and the ilioinguinal and the iliohypogastric nerves of the lumbar plexus.
What does the visceral peritoneum enclose?
The Visceral (viscus = organ) layer encloses the surfaces of the intraperitoneal organs.
peritionitis
Inflammation of the parietal peritoneum (peritonitis) results in sharp pain that is localized over the area.
What are mesenteries?
What are the functions of mesenteries?
The following are important remnants of mesenteries in the abdomen. Define what they attach to:
lesser omentum
greater omentum
What are ligaments?
Mesenteries (meso = middle; enteron = intestine) are double-layered peritoneal membranes that suspend parts of the GI tract from the body wall. This allows the parts of the GI tract to move around as needed. The mesenteries are used as a route for vessels, nerves, and lymphatics to reach the GI tract.
Some important remnants of mesenteries in the abdomen are:
The lesser omentum - attach the liver to the lesser curvature of the stomach and the duodenum.
The greater omentum - attaches to the greater curvature of the stomach and the transverse colon.
Ligaments - reflections of mesenteries between organs or the body wall that are named according to their attachments.
Where is extraperitoneal fascia located? What does it enclose?
Extraperitoneal fascia - deep to the transversalis fascia (lines the abdominal cavity.)
The ______ plus the ______ equals the lesser omentum.
The lesser omentum connects the _______ to the _____.
The epiploic foramen of Winslow connects the _____ to the _______.
- The hepatogastric ligament plus hepatoduodenal ligament equals lesser omentum.
- The lesser omentum connects the liver (porta hepatis portion) to the lesser curvature of the stomach and the first part of the duodenum.
- The epiploic foramen of Winslow connects the lesser sac to the greater sac .
The abdominal viscera are lined by _____.
How do organs in the abdominal cavity receive blood supply?
- The abdominal viscera are lined by peritoneum.
- Some organs (e.g. ascending and descending colon) never grow into the cavity and are pressed against the body wall in their retroperitoneal position.
- Other organs like the pancreas become secondarily retroperitoneal.
- All of the structures receive their blood supply from vessels that pass through folds of peritoneum.
The abdominal cavity is lined by peritoneum and is subdivided into ______ and _____ ______.
The abdominal cavity is lined by peritoneum and subdivided into the greater and lesser sacs.
What are the anterior and posterior borders of the lesser sac?
Peritoneal cavity
• During development the peritoneal cavity is subdivided into the greater and lesser sacs.
• The lesser sac is bordered by the posterior abdominal wall (posteriorly) and the gastrocolic ligament, stomach and lesser omentum (anteriorly).
• The two sacs communicate through the epiploic foramen of Winslow.
When placing your finger through the epiploic foramen of Winslow, you are connecting the greater and lesser sacs. What lies anterior, posterior, superior, and inferior the this foramen?
You should know these important relationships within the foramen of Winslow:
• Anterior - Hepatoduodenal ligament and the hepatic portal vein
• Posterior - Inferior vena cava
• Superior - Caudate lobe of the liver
• Inferior - First part of the duodenum
List the intraperitoneal, secondarily retroperitoneal, and retroperitoneal organs of the abodminal cavity.
A sliding hiatal hernia occurs when the cardia of the stomach herniates through the esophageal hiatus of the diaphragm. What is a neurological consequence of this?
This can damage the vagal trunks as they pass through the hiatus.