Development of GI and Kidneys Flashcards
What part of the gut maintains its connection to the yolk sac?
Midgut by means of the vitelline duct
What are the arteries supplying the foregut?
Celiac trunk:
Splenic, left gastric, common hepatic
What arteries supply the midgut?
Superior mesenteric:
intestinal branch, ilieocolic, right colic, middle colic
What arteries supply the hindgut?
Inferior mesenteric:
Left colic, sigmoid branch, superior rectal
What is unique about foregut vs midgut/hindgut?
The foregut has attachments to both ventral and dorsal walls the others only have dorsal
What is the nerve supply for the foregut?
Vagus
What is the nerve supply for the midgut?
Vagus
What is the nerve supply for the hindgut?
Pelvic splanchnics
What does the foregut consist of?
Stomach to the first half of duodenum
What does the midgut consist of?
Second half of duodenum to the 2/3 transverse colon
What does the hindgut consist of?
Distal third of transverse colon to rectum
What does the ventral mesentery of the liver become?
Falciform ligament
What does the lesser omentum connect?
Liver to the lesser curvature to the stomach
What does the left vagus innervate on the stomach?
Anterior portion
What does the right vagus innervate on the stomach?
Posterior portion
How does the pyloric and cardiac sphincter shift respectively due to the liver?
Pyloric: Right and superior
Cardiac: Left and down
What is the septum transversum?
Separates abdominal from plural cavity (develops into the diaphragm)
What is the bare area of the liver?
Contains no visceral pleura
What occurs with formation of the pancreas?
- ) Dorsal and Ventral buds form
- ) Ventral pancreas rotates with stomach
- ) Ventral bud is inferior after rotation
- ) Fusion of the dorsal and ventral pancreas
What is the pancreatic duct formed from?
Ventral and dorsal (main) fusion (may have accessory pancreatic duct)
How does the embryo communicate with the yolk sac?
Via the yolk stalk
How do the intestines rotate?
90 degrees clockwise outside body and 180 degrees once back inside the body
How does the cecum move in development?
Descends from the right upper quadrant to the right lower
What is it called when the intestines stay outside the body?
Umbilical omphalocele
What are the three kidneys in development?
Pronephros
Mesonephros
Metanephros
What is the pronephros?
First kidneys that are non functioning and degenerate
What are the mesonephros?
Second kidneys functioning; degenerate
What are the metanephros?
Final kidneys in adults
What does the mesonephric duct become?
A part of the testis
Where does the collecting duct come from?
Metanephric mesenchyme
What comes from the uretic bud?
Pelvis
Major and minor calyx
