Renal Embryology Flashcards
What type of tissue forms the Urogenital Ridge?
Intermediate Mesoderm
The Urogenital Ridge is made of intermediate mesoderm and runs on each side of the ______
Dorsal Aorta
A portion of the Urogenital Ridge forms the?
Nephrogenic Cord
The Nephrogenic Cord gives rise to what 3 portions of the primitive kidney?
- Pronephros
- Mesonephros
- Metanephros
When does the Pronephros appear?
4th week
The Pronephros is located in what body region?
Cervical region
The Pronephros forms?
Pronephric duct that extends caudally to the cloaca
Fate of the Pronephros?
Degenerates except for the Pronephric duct
After the Pronephros forms, what forms next?
Mesonephros
The Mesonephros includes what 2 elements?
Mesonephric Duct
Mesonephric Tubules
The Mesonephric Tubules are made of surrounding?
Intermediate Mesoderm
The Mesonephric Tubules form ___ at their medial end
Renal Corpuscles
Function of the Mesonephros?
Functions as interim Kidney from week 6-10
Fate of Mesonephros in females?
Regresses
Fate of Mesonephros in males?
Forms efferent ductules
After the Mesonephros forms, what forms next?
Metanephros
The Mesonephric duct at the Metanephros forms what caudal outgrowth?
Ureteric bud
The Nephrogenic Cord around the Metanephros forms?
Metanephric Blastema
Where is the Metanephric Blastema located?
At the tip of the ureteric bud
Where is the Ureteric Bud located?
A caudal outgrowth from the Mesonephric duct
As the ureteric bud penetrates the metanephric blastema, what is formed?
Hilum of the kidney
The ureteric bud stalk becomes?
Ureter
The cranial part of the ureteric bud branches and forms?
Collecting ducts
Major Calices
Minor Calices
The collecting ducts of the ureteric bud induce the metanephric blastema to form?
Metanephric vesicles
The metanephric vesicles elongate to form?
Metanephric Tubules
The proximal end of the Metanephric Tubules form?
Glomerular capsule
The distal end of the Metanephric Tubules form?
PCT, DCT and Nephron loop
The elements formed from the ureteric bud are known as the _____ portion of the kidney
Collecting
The elements formed from the metanephric blastema are known as the ____ portion of the kidney
Excretory
As the Kidneys ascend into the abdomen, the hilum rotates?
Medially 90 degrees
By what week are the kidneys in position?
9
If the kidney has accessory renal arteries, what could they potentially obstruct?
Ureter
Unilateral Renal Agenesis is suspected in who?
Males with 1 umbilical artery
Is Bilateral Renal Agenesis viable?
No
What causes ureter duplications?
Abdnormal division of the ureteric bud!
Abnormal Incomplete division of the ureteric bud causes?
Divided kidney with bifed ureter
Abnormal Complete division of the ureteric bud causes?
Double kidney with bifed or separate ureters
Horseshoe kidney
Fusion of the inferior poles
Kidneys are inferior to IMA
Polycystic Kidney Disease involves a _______ mutation in the gene _____
Autosomal Recessive
PKHD1
Polycystic Kidney Disease creates cysts in 1 or both kidneys?
BOTH
Multicystic Dysplastic Kidney Disease creates cysts in 1 or both kidneys?
1
With Multicystic Dysplastic Kidney disease, the cysts are likely dilations of?
Loop of Henle
What portion of the Urogenital sinus forms the majority of the bladder?
Vesical portion
The urogenital sinus is connected to the mesonephric duct and thus the ureteric bud. The mesonephric ducts are connected to the ____ wall of the urogenital sinus
Posterior
The openings of the mesonephric ducts are carried inferiorly in the bladder. What does this form?
Trigone
What is attached to the superior end of the bladder?
Allantois
What does the Allantois form?
Urachus
What does the Urachus connect?
Umbilicus to the bladder
The Urachus should become?
Median umbilical ligament
Bladder epithelium
Endoderm
Bladder submucosa
Splanchnic mesoderm
Bladder Trigone is made of?
Intermediate mesoderm
Exstrophy of bladder is more common in?
Males
Exstrophy of bladder
Exposure of posterior wall of the bladder
What usually causes Exstrophy of bladder?
Defective abdominal wall closure