Part II. Peritoneum, Peritoneal Cavity pg 45-48 Flashcards
What is the mesothelium lining internal surface of the abdominopelvic wall?
Parietal peritoneum
How does the parietal peritoneum receive somatic sensory innervation for pain, temp, pressure, etc?
Via adjacent dermatomes
What is the Mesothelium covering (investing) abdominopelvic viscera?
Visceral peritoneum
How does the visceral peritoneum receive somatic sensory innervation for pain, temp, pressure, etc?
It doesn’t - no somatic sensory innervation however Visceral afferent innervation (stretch, chemical) may result in referred pain
What is the histological equivalent to the visceral peritoneum?
Serosa
Potential space present between parietal/visceral peritoneum
Peritoneal cavity
What is contained in the peritoneal cavity?
No viscera, only thin field of peritoneal fluid
What is contained in the peritoneal fluid and what is the function of those components?
- Lubricants - allows for friction-free movements of digestion on visceral surfaces
- leukocytes and antibodies to fight infection
The peritoneal cavity is open to the exterior in females (completely closed cavity in males) via what pathway?
Uterine tubes, uterus and vagina
Organs that are all or mostly covered in visceral peritoneum and suspended by mesentary are called what?
Intraperitoneal organs
NOTE: Still, technically, not inside peritoneal cavity (misnomer)
Development connection: they have invaginated into the closed peritoneal cavity during lateral folding of the embryo
What are some examples of intraperitoneal organs?
Examples: stomach, spleen, jejunum, ileum, transverse colon, liver
Organs that are partially covered by parietal peritoneum and located external or posterior to the peritoneal cavity are called what?
Extraperitoneal (retroperitoneal) organs
Extraperitoneal organs are covered with ________ on one side and ________ on the rest.
parietal peritoneum: adventitia
What are primarily retroperitoneal organs vs. secondarily retroperitoneal organs?
Primarily: Embryonically behind peritoneum and remain there in adult
Secondarily: Embryonically intraperitoneal but become retroperitoneal due to return of gut
What are some examples of primarily retroperitoneal organs?
Examples: suprarenal gland, kidney, ureter, uterus, ovary, aorta, IVC
What are some examples of secondarily retroperitoneal organs?
Examples: duodenum, ascending/descending colon, pancreas, rectum
The region below the umbilical has 5 folds. What are they?
1 median umbilical fold
2 medial umbilical folds
2 lateral umbilical folds
Which peritoneal fold extends from apex of urinary bladder to umbilicus? What ligament does it contain?
Median Umbilical Fold
Contains Median Umbilical Ligament
The median umbilical ligament is a remnant of what fetal structure?
Urachus
What peritoneal folds are located lateral to Median Umbilical Fold? What ligaments do they contain?
Medial Umbilical Folds
Contains Medial Umbilical Ligaments
The Medial Umbilical Ligaments are fetal remnants of what structures?
Umbilical arteries
What peritoneal folds are located lateral to the medial umbilical folds? What structures do they contain?
Lateral Umbilical Fold
contains Inferior Epigastric artery and vein
The depression Located between Median and Medial Umbilical Folds that is formed by reflection of parietal peritoneum from anterior wall to urinary bladder.
Supravesical fossa
The size and location of the supravesical fossa varies because of what structure?
urinary bladder as it fills and empties
The depression that is located between Medial and Lateral Umbilical Folds.
Medial inguinal fossa