L31: Anatomy of the Peritoneum and Peritoneal Cavity Flashcards
What is a peritoneum?
A single of layer of flattened mesothelial cells supported by fibroelastic tissue. Fat is often stored adjacent to the peritoneum
What is a peritoneal cavity?
Contains only a small amount of serous fluid. Abdominal organs are excluded from the space by their peritoneal covering
What is the intraperitoneal?
Organs that are suspended from the abdominal roof within the peritoneal reflections
What is retroperitoneal?
Organs that are directly joined to the abdominal wall
What is parietal peritoneum?
Lines the walls
What is visceral peritoneum?
Directly contacts (enshrouding) the organs
In the Intraembryonic coelom, around what stage and week would the development of the peritoneal viscera be at?
Stage 11/ Week 4 or so
Early abdominal cavity lined with peritoneum is derived from __?
Visceral lateral plate mesoderm
What does the neural tube form much of?
GI Tract
Organs develop and invaginate into ____ pulling a neurovascular supply with them.
Peritoneum
What are two examples of coelomic invagination?
- Lungs
2. Heart
What is a mesentery?
Double layer of peritoneum that forms as a result of the invagination of the peritoneum by an organ; vessels and nerves pass in the mesentery to supply the large and small intestines
What does the mesentery attach to? By what?
Abdominal wall by a short peritoneal attachment known as the root of the mesentery.
Developing ____ ‘drags’ vasculature, nerve supply, and lymphatics into the newly formed mesentery.
Intestine
What does the root of mesentery anchor?
Anchors the Great mesentery to the dorsal abdominal wall
What is mesocolons?
Ascending,transverse, and descending mesocolons connect the ascending, transverse, and descending colons to the dorsal body wal
What is mesoduodenum? Where does it originate at?
Double layer of peritoneum that forms as a result of the invagination of the peritoneum by an organ. Originates at the dorsal abdominal wall and the root of the mesentery and extends to the duodenum
What is omentum? What is an extension of?
The connecting peritoneum that attaches the stomach to the body wall or other organs- ti is an extended mesogastrium
What is the greater omentum? What does it attach to?
An extended fold of dorsal mesogastrium, attaches the greater curvature of the stomach to the dorsal wall at pancreas
What is the lesser omentum?
A part of the ventral mesogastrium
- Loosely spans the distance from the lesser curvature of the stomach to the porta of liver
What does the hepatoduodenal ligament attach to and what does it contain (3 things)?
Attaches liver to the duodenum
- Contains the portal vein, hepatic artery, and bile duct
What are the omental bursae (greater and lesser sacs)?
Fundamental division in the peritoneal cavity; both sacs are continuous but the communication between the two is restricted to the epiploic foramen
What is the excess of fluid in the abdomen called?
Ascites
