Gastrointestinal Anatomy Flashcards Preview

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Flashcards in Gastrointestinal Anatomy Deck (88)
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1

Where is the GI derived from?

Endoderm

2

What gives rise to the esophagus, stomach, proximal half of the duodenum, liver, gallbladder, and pancreas?

The foregut

3

What gives rise to the distal third of the transverse colon to the proximal half of the anal canal?

The hindgut

4

What gives rise to the distal half of the duodenum, small intestine, proximal half of large intestine up to the proximal 2/3 of transverse colon?

The midgut

5

How often does Meckel's diverticulum occur? Where does it occur?

2%; 2 feet proximal to the ileocecal junction

6

What region of the abdomen contains the stomach, duodenum, and pancreas?

Epigastric

7

What region of the abdomen contains the kidneys?

Right and left flank

8

What region contains of the abdomen liver and gallbladder?

Right hypochondrium

9

What region of the abdomen contains the bladder and uterus?

Hypogastric

10

What region of the abdomen contains only the small intestine?

Umbilical

11

What region of the abdomen contains the left ovary, left uterine tube, and sigmoid colon?

Left iliac fossa

12

What region of the abdomen contains the spleen?

Left hypochondrium

13

What region of the abdomen contains the appendix, right ovary and right uterine tube, and cecum?

Right iliac fossa

14

What dermatome innervates the level of the xiphoid process?

T7

15

What dermatome innervates the level of the umbilical region?

T10

16

What dermatome innervates the level of the inguinal region?

L1

17

What is immediately below skin in the anterior abdominal wall?

Subcutaneous tissue

18

What is the outer layer of the subcutaneous abdominal tissue is continuous with the fatty subcutaneous layer of the rest of the body?

Camper's fascia

19

What layer of subcutaneous fascia is present only in the lower abdomen?

Membranous or Scarpa's fascia

20

What does scarpa's fascia continue as?

Colles fascia in the scrotum and Buck's fascia in the penis

21

What is the lateral edge of the rectus sheath?

Linea semilunaris

22

What three structures are medial to the linea semilunaris?

Anterior layer of the rectus sheath
Rectus abdominis muscle
Posterior layer of the rectus sheath

23

Other than skin, subcutaneous fascia, and muscle, what are the remaining 3 layers?

Transversalis fascia, extraperitoneal fat, and parietal peritoneum

24

What levels of innervation supply the abdominal wall?

T7-11, subcostal T12, and Iliohypogastric/ilioinguinal L1

25

What forms the anterior layer of the rectus sheath above the arcuate line?

External oblique aponeurosis
Anterior layer of the internal oblique aponeurosis

26

What forms the posterior layer of the rectus sheath above the arcuate line?

Posterior layer of the internal oblique aponeurosis
Aponeurosis of transversus abdominus

27

What forms the anterior layer of the rectus sheath below the arcuate line?

The aponeurosis of the internal and external oblique and the aponeurosis of the transversus abdominus

28

What forms the posterior layer of the rectus sheath below the arcuate line?

Only the the transversalis fascia

29

Where is the arcuate line located?

Posterior to the rectus muscle midway between the umbilicus and the symphysis

30

What is the peritoneum?

Inner lining of the abdominal cavity