5.1 Digestive System Components Flashcards
Describe the superor/inferior boundaries of the anterolateral abdominal wall
Superior: xiphoid process + costal margins
Inferior: Iliac crest, down to ASIS, down to pubic symphysis
What’s the surface anatomical landmark used to palpate the fundus of the gallbladder?
Tip of the 9th costal cartilage, right side.
Describe the four lines that pass through the abdomen to form the 3x3 grid of sections
- Iliac crests (horiz)
- Subcostal border (horiz)
- Midclavicular lines (vert_
Recall the 9 regions of the anterolateral abdominal wall
Top: R/L hypochondriac + epigastric
Middle: R/L Lumbar + Umbilical
Lower: R/L Inguinal + Hypogastric
The transpyloric line is the midpoint between the…
Jugular notch and superior border of pubic symphysis
What GI structures does the transpyloric plane transect?
- Pylorus of stomach
- Fundus of gallbladder
- Neck of pancreas
- Renal hila
What characterises digestive accessory structures? Give 4 examples
- These are structures that aid in digestion, but are not part of the digestive tract itself.
- Examples include salivary glands, the gall bladder, the pancreas, and the liver
Why are accessory digestive organs important?
- Digestive efficiency (absorbable components)
- Storage of nutrients (e.g. liver)
- Homeostasis regulation (pancreas, bile composition)
Liver surface landmarks/quadrant
- Start at right costal margin, push upwards
- RUQ
Stomach surface landmarks/quadrant
- Start at left costal margin, extends centrally
- LUQ
Peritoneal position of liver
Intraperitoneal
Peritoneal position of gallbladder
Intraperitoneal
Peritoneal position of stomach
Intraperitoneal
Peritoneal position of the parts of the duodenum
First part is intra. Remaining three are retro.
(Starts in, then leaves the system)
Peritoneal position of ileum and jejunum
Entirely intraperitoneal
Peritoneal position of all parts of the colon
- Only the transverse is intraperitoneal
- The remaining (asc, desc, sigmoid, rectum) are retroperitoneal; after all, don’t want shit in the peritoneum
Peritoneal position of pancreas
- Tail is intra
- Rest is retro
(Tried to escape the system, but got it’s tail caught in the door)
Peritoneal position of spleen
- Intra (w/ the tail of the pancreas; makes sense)