Part II. Peritoneum, Peritoneal Cavity pg 45-48 Flashcards

1
Q

What is the mesothelium lining internal surface of the abdominopelvic wall?

A

Parietal peritoneum

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2
Q

How does the parietal peritoneum receive somatic sensory innervation for pain, temp, pressure, etc?

A

Via adjacent dermatomes

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3
Q

What is the Mesothelium covering (investing) abdominopelvic viscera?

A

Visceral peritoneum

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4
Q

How does the visceral peritoneum receive somatic sensory innervation for pain, temp, pressure, etc?

A

It doesn’t - no somatic sensory innervation however Visceral afferent innervation (stretch, chemical) may result in referred pain

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5
Q

What is the histological equivalent to the visceral peritoneum?

A

Serosa

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6
Q

Potential space present between parietal/visceral peritoneum

A

Peritoneal cavity

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7
Q

What is contained in the peritoneal cavity?

A

No viscera, only thin field of peritoneal fluid

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8
Q

What is contained in the peritoneal fluid and what is the function of those components?

A
  • Lubricants - allows for friction-free movements of digestion on visceral surfaces
  • leukocytes and antibodies to fight infection
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9
Q

The peritoneal cavity is open to the exterior in females (completely closed cavity in males) via what pathway?

A

Uterine tubes, uterus and vagina

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10
Q

Organs that are all or mostly covered in visceral peritoneum and suspended by mesentary are called what?

A

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

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11
Q

What are some examples of intraperitoneal organs?

A

Examples: stomach, spleen, jejunum, ileum, transverse colon, liver

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12
Q

Organs that are partially covered by parietal peritoneum and located external or posterior to the peritoneal cavity are called what?

A

Extraperitoneal (retroperitoneal) organs

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13
Q

Extraperitoneal organs are covered with ________ on one side and ________ on the rest.

A

parietal peritoneum: adventitia

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14
Q

What are primarily retroperitoneal organs vs. secondarily retroperitoneal organs?

A

Primarily: Embryonically behind peritoneum and remain there in adult
Secondarily: Embryonically intraperitoneal but become retroperitoneal due to return of gut

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15
Q

What are some examples of primarily retroperitoneal organs?

A

Examples: suprarenal gland, kidney, ureter, uterus, ovary, aorta, IVC

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16
Q

What are some examples of secondarily retroperitoneal organs?

A

Examples: duodenum, ascending/descending colon, pancreas, rectum

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17
Q

The region below the umbilical has 5 folds. What are they?

A

1 median umbilical fold
2 medial umbilical folds
2 lateral umbilical folds

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18
Q

Which peritoneal fold extends from apex of urinary bladder to umbilicus? What ligament does it contain?

A

Median Umbilical Fold

Contains Median Umbilical Ligament

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19
Q

The median umbilical ligament is a remnant of what fetal structure?

A

Urachus

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20
Q

What peritoneal folds are located lateral to Median Umbilical Fold? What ligaments do they contain?

A

Medial Umbilical Folds

Contains Medial Umbilical Ligaments

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21
Q

The Medial Umbilical Ligaments are fetal remnants of what structures?

A

Umbilical arteries

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22
Q

What peritoneal folds are located lateral to the medial umbilical folds? What structures do they contain?

A

Lateral Umbilical Fold

contains Inferior Epigastric artery and vein

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23
Q

The depression Located between Median and Medial Umbilical Folds that is formed by reflection of parietal peritoneum from anterior wall to urinary bladder.

A

Supravesical fossa

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24
Q

The size and location of the supravesical fossa varies because of what structure?

A

urinary bladder as it fills and empties

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25
Q

The depression that is located between Medial and Lateral Umbilical Folds.

A

Medial inguinal fossa

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26
Q

What is the site of direct inguinal hernias?

A

Medial Inguinal Fossa (Inguinal Triangle)

27
Q

What is the site for indirect inguinal hernias?

A

Lateral Inguinal Fossa

28
Q

What depression is located lateral to Lateral Umbilical Fold and where the Deep Inguinal Ring is?

A

Lateral Inguinal Fossa

29
Q

What is the Sagittal peritoneal fold/reflection spanning between anterior abdominal wall and liver in the region above the umbilicus?

A

Falciform ligament

30
Q

The inferior, thickened edge of the falciform ligament.

A

Ligamentum Teres (Round L of liver)

31
Q

The Ligamentum Teres (Round L of liver) contains fetal remnant of what structure?

A

Umbilical vein

32
Q

What is mesentary?

A

Double layer of peritoneum connecting intraperitoneal organ to posterior abdominal wall and spans distance between parietal peritoneum and visceral peritoneum.

NOTE: again think of the lateral folding that occurs in fetal development

33
Q

What is contained in mesentary?

A

CT with blood vessels, lymphatics, nerves, lymph nodes and fat - neurovasculature passing from body wall to intraperitoneal organ

34
Q

What is omentum?

A

Double layer of peritoneum spanning from stomach and/or proximal duodenum to
adjacent organs

35
Q

What double layer of peritoneum spans from lesser curvature of stomach and proximal duodenum to liver?

A

Lesser omentum

36
Q

The lesser omentum is the adult remnant of what embryonic structure?

A

Ventral mesentary

37
Q

Thin membrane spanning from liver to lesser curvature of stomach

A

Hepatogastric L

38
Q

The thickened right side free edge of lesser omentum that spans from liver to proximal duodenum and surrounds portal triad

A

Hepatoduodenal L

39
Q

What is included in the portal triad?

A

Hepatic Portal V, Proper Hepatic A, Common Bile Duct

40
Q

The double layer of peritoneum that hangs from greater curvature of stomach and then
folding back on itself to attach to transverse colon

A

Greater omentum

41
Q

The greater omentum is the exult remnant of what embryonic structure?

A

Dorsal mesentary

42
Q

What is the function of the greater omentum?

A
  • Prevents abdominal viscera from adhering to anterolateral wall
  • Wraps itself around inflamed organs to protect other viscera

NOTE: Sometimes referred to as the “abdominal policeman”

43
Q

What is the gastrocolic ligament and where is it located?

A

The largest portion of greater omentum that spans from greater curvature of stomach to transverse colon and drapes over small intestine

44
Q

Where is the gastrosplenic ligament located?

A

Spans from greater curvature of stomach to spleen

45
Q

Where is the gastrophrenic ligament located?

A

Spans from greater curvature of stomach to thoracic diaphragm

46
Q

The lesser omentum includes two ligamentous structures. What are they?

A

Hepatogastric ligament

Hepatoduodenal ligament

47
Q

The greater omentum includes 3 ligamentous structures. What are they?

A

Gastrocolic ligament
Gastrosplenic ligament
Gastrophrenic ligament

48
Q

The peritoneal cavity has 2 subdivisions. What are they?

A

Greater sac

Lesser sac

49
Q

The main large subdivision of the peritoneal cavity is the greater sac. It is further subdivided into what compartments?

A
  • supracolic compartment
  • infracolic compartment
  • paracolic gutters
50
Q

The compartment of the greater sac of the peritoneal cavity that is located anterosuperior to the greater omentum and transverse colon

A

Supracolic compartment

51
Q

What is contained in the Supracolic compartment?

A

Contains stomach, liver, spleen

52
Q

The compartment of the greater sac of the peritoneal cavity that is located posterosuperior to the greater omentum and transverse colon

A

Infracolic compartment

53
Q

What is contained in the infracolic compartment?

A

Contains small intestine, ascending/descending colon

54
Q

The infracolic compartment is divided into right and left sides by what structure?

A

small intestinal mesentery

55
Q

Grooves that are part of the greater sac of the peritoneal cavity and are located between lateral sides of ascending/descending colon and posterolateral
abdominal wall

A

Paracolic gutters

56
Q

What is the function of the paracolic gutters?

A
  • Provides communication between supracolic and infracolic compartments

NOTE: they make convenient avenues for spread of infection (ascites) or cancerous cells

57
Q

The small portion of peritoneal cavity posterior to stomach and lesser omentum

A

Lesser sac (omental bursa)

58
Q

Describe the location of the Lesser sac (omental bursa)

A

Posterior to stomach and lesser omentum

  • extends superiorly behind liver and up to thoracic diaphragm
  • Extends inferiorly between superior layers of Gastrocolic L (Greater Omentum)
59
Q

What is the epiploic foramen (AKA omental foramen, foramen of Winslow)

A

A point of communication between greater and lesser sac, located posterior to hepatoduodenal ligament

60
Q

What structures are located anterior to the epiploic foramen?

A

Hepatic portal vein
Proper hepatic artery
Common bile duct
* all surrounded by hepatoduodenal ligament

61
Q

What structures are located posterior to the epiploic foramen?

A
  • Inferior vena cava

- Right crus of the thoracic diaphragm

62
Q

What is located superiorly to the epiploic foramen?

A

Caudate lobe of the liver

63
Q

What is located inferiorly to the epiploic foramen?

A

First part of the duodenum