Lecture 3- Peritoneum Flashcards
Arteries that supply blood to the foregut?
Celiac trunk:
-Splenic, left gastric, and common hepatic
Ventral mesentery of the foregut?
- Lesser omentum
- Falciform ligament
- Coronary/triangular ligaments
Dorsal mesentery of the foregut?
- Gastrosplenic ligament
- Splenorenal ligament
- Gastrocolic ligament
- Greater omentum
Motor nerve supply of the foregut?
Vagus nerve
Organs within the midgut?
- 2nd half of duodenum
- Jejunum
- Ileum
- Cecum (appendix)
- Ascending colon
- Proximal 2/3 of transverse colon
Arteries that supply blood to the midgut?
Superior mesenteric artery
-Ileocolic, right colic, and middle colic
Ventral mesentery of the midgut?
None
Dorsal mesentery of the midgut?
- Mesointestine
- Mesoappendix
- Transverse mesocolon
Motor nerve supply of the midgut?
Vagus nerve
Organs within the hindgut?
- Distal 1/3 of transverse colon
- Descending colon
- Sigmoid colon
- Rectum
Arteries that supply blood to the hindgut?
Inferior mesenteric artery
-Left colic, sigmoid branches, superior rectal
Ventral mesentery of the hindgut?
None
Dorsal mesentery of the hindgut?
Sigmoid mesocolon
Motor nerve supply of the hindgut?
Pelvic splanchnic nerves
Peritoneum
- What is it?
- 2 layers?
- A serous membrane
- Parietal and visceral layers (just like pleura and pericardium)
Peritoneum
-Parietal layer?
- Lines the body wall
- Has abundant pain fibers
Peritoneum
-Visceral layer (serosa)?
- Covers viscera
- Lacks pain fibers
Nerve supply to the parietal peritoneum
- Supplied by?
- Type of fibers they supply?
- What type of pain do they conduct?
- Nerves from the adjacent body wall supply parietal peritoneum
- Supply pain and vasomotor fibers
- Conduct sharp, stabbing pain-Rigid abdomen/”guarding”
Visceral peritoneum-Invests viscera/organs
-Blood supply, lymphatic vasculature and visceral nerve supply?
Same blood supply, lymphatic vasculature, and visceral nerve supply as the organs it covers
Visceral peritoneum
- Insensitive to?
- Sensitive to?
- Insensitive to touch, heat, cold, and laceration
- Sensitive to stretching and chemical irritation
Visceral Peritoneum
- Pain from visceral peritoneum?
- Type of pain?
- Type of fibers?
- Poorly localized-e.g. referred pain
- Crampy, colicky pain
- Unmyelinated type C fibers
General relations of viscera to peritoneum
- Intraperitoneal organs
- Covered by?
- Suspended by?
- Covered on most sides by visceral peritoneum
- Suspended by mesentery from the body wall
Retroperitoneal organs
- Position relative to parietal peritoneum?
- Covered by?
- Lie deep (“retro”) to the parietal peritoneum
- Covered by parietal peritoneum on ONE SIDE ONLY
Organs of the abdomen and pelvis
-Intraperitoneal organs in the abdominal peritoneal cavity?
- Stomach
- Small intestine (some of superior part of duodenum, all of jejunum and ileum)
- Spleen
- Liver
- Gallbladder
- Cecum (and appendix)
- Large intestine (transverse and sigmoid)
Intraperitoneal organs in the pelvic peritoneal cavity?
Uterus (fundus and body), ovaries, and uterine tubes
Primarily vs secondarily retroperitoneal?
Secondarily retroperitoneal is when the organ loses its mesentery during development
Organs that are primarily retroperitoneal?
-Easy way to remember this?
- Kidneys
- Uretrers
- Adrenal glands
- Gonads/uterine cervix
- Aorta and IVC
- “Ask yourself if the organ is part of the gut? If the answer is no, then it is primarily retroperitoneal”
Organs that are secondarily retroperitoneal?
- Duodenum (descending, horizontal, and ascending)
- Pancreas
- Ascending and descending colon
- Rectum (upper 2/3)
Organs that are infraperitoneal/subperitoneal?
- Urinary bladder
- Distal ureters
- Prostate
- Seminal vesicle
- Vagina
- Rectum (lower 1/3)
Peritoneal reflections in the adult
-Mesenteries
- 2 layered fold of the peritoneum
- THE mesentery