GI Flashcards
Describe the path through the GI tract
Oesophagus Stomach Duodenum Jejunum Ileum Cecum Asc. colon Transverse colon Desc. colon Sigmoid colon Rectum 1/3 of anal canal
Where is the intertubercular plane?
Where the abdominal aorta bifurcates (L4)
Where is the subcostal plane?
Beneath the most inferior rib
Where is the transpyloric plane?
Halfway between jugular notch and superior pubic symphysis.
Tip of 9th costal cartilage
What lies on the transpyloric plane? (7)
Gallbladder Pylorus of stomach D1 of duodenum Duodeno-jejunal flexure Hepatic flexure of colon Splenic flexure of colon Neck of pancreas
Where is McBurney’s point?
On the right side of abdomen!
2/3rds along a line joining umbilicus and right ASIS
Why is McBurney’s point important?
Appendix lies here
Where is the intercristal plane?
Lies along highest point of the pelvis
What’s the lateral superior region of the abdomen called?
R + L hypochondrium
What’s the lateral-medial region of the abdomen called?
R + L flank
What’s the lateral inferior region of the abdomen called?
R + L iliac fossa
What’s the medial superior region of the abdomen called?
Epigastrium
What’s the middle region of the abdomen called?
Umbilicus
What’s the medial inferior region of the abdomen called?
Hypogastrium/ Suprapubic
What regions follow the flank posteriorly?
Lion and lumbar region
List the muscles of the abdomen working your way IN.
Serratus anterior External oblique (and its aponeurosis) Internal oblique Transverse oblique Rectus abdominis
What is the linea alba?
Fibrous structure running down midline of the abdomen (from xiphoid process to the pubic symphysis)
What doesn’t cross the midline of the abdomen?
Muscle fibres
What structures make up the foregut? (8)
Oesophagus, stomach, D1 and D2 of duodenum, liver, gallbladder, pancreas and spleen
Blood supply of the foregut?
Coeliac trunk
Sympathetic innervation of the foregut?
Greater splanchnic nerve (T5-9)
Parasympathetic innervation of foregut?
Vagus
Pain in foregut is referred to?
Epigastrium
What structures lie in the midgut?
D3 and D4 of the duodenum, jejunum, ileum, cecum, appendix, ascending colon, 2/3 along transverse colon
Blood supply of midgut?
Superior mesenteric artery
Sympathetic innervation of midgut?
Lesser splanchnic nerve (T10-11)
Pain in midgut is referred to?
Umbilicus
What structures lie in the hindgut?
Last 1/3 of transverse colon, descending colon, sigmoid colon, rectum, upper 1/3 anal canal
Blood supply of the hindgut?
Inferior mesenteric artery
Innervation of the hindgut?
Least splanchnic nerve (T12)
The rectus abdominis is surrounded by what structure?
Rectus sheath
Relationship between rectus abdominis and aponeurosis of transverse oblique
Aponeurosis of TO passes BEHIND the rectus abdominis
Relationship between rectus abdominis and internal oblique
One part of IO passes OVER and the other part BEHIND the rectus abdominis muscle
Relationship between rectus abdominis and aponeurosis of external oblique
Aponeurosis of EO passes OVER the rectus abdominis
What are the 3 ligaments of the liver?
Coronary ligament
Falciform ligament
Round ligament (ligamentum teres)
What does the coronary ligament do?
Attaches the liver to the inferior surface of the diaphragm
What does the falciform ligament do? (2)
Attaches liver to the anterior abdominal wall
Separates liver into R + L lobes
Where does the stomach lie in relation to the liver?
Stomach lies deep to the left lobe of the liver
Where does the stomach lie in relation to the liver?
Stomach lies deep to the left lobe of the liver
Where does the gallbladder lie in relation to the liver?
Gallbladder sits on inferior surface of the right lobe of the liver
What is the lesser omentum?
Thin fatty sheet of tissue containing blood vessels and nerves
How is the lesser omentum attached?
Attaches the lesser curvature of stomach to the liver superiorly.
Contains the portal triad entering the porta hepatis
What is the free edge of the lesser omentum called?
Epiploic foramen (foramen of Winslow)
What is the porta hepatis and why is it important?
Deep fissure on inferior surface of liver.
Contains portal triad.
What is the portal triad? (from posterior to anterior –> VAD)
Portal vein
Hepatic artery
Bile duct
What is the greater omentum?
Double layer of peritoneum that sits over the small intestines and encloses the transverse colon