What germ layer do the kidneys originate from?
Which particular part of the mesoderm do the kidneys develop from?
What structure do the kidneys originate from?
The pronephros develops into which structure?
How does the pronephros descend into its correct position for development?
What does the mesonephros develop into, forming the permanent kidney?
Which embryological structures do the metanephros develop from?
What duct does the ureteric bud come from?
What is the other origin of the kidneys apart from the ureteric bud?
Which germ layer does it come from?
Intermediate mesoderm in the sacrum
The ___ ___ pushes into the ___ ___.
(ureteric bud, metanephric blastema)
ureteric bud pushes into the metanephric blastema
What happens when the ureteric bud fails to push into the metanephric blastema?
Lack of a kidney
What structures of the kidney does the ureteric bud develop into?
so the collecting ducts all the way to the ureters
What embryological origin of the kidney forms the nephrons themselves?
What embryological structures form the
a) collecting system
of the kidney?
a) Ureteric bud
b) Metanephric blastema
Which body cavity do the kidneys originate in?
What do they need to do after that?
Ascend to the retroperitoneal space of the abdomen
After they've ascended, are the kidneys intraperitoneal or retroperitoneal?
As the kidneys ascend from the pelvis to the abdomen, which blood vessel do they draw a supply from?
As the kidneys rise, the vessels they draw blood from degenerate. What happens when this doesn't occur?
Accessory renal arteries
What can happen if one or both kidneys fail to ascend?
Remains in the pelvis
What is a horseshoe kidney?
Metanephrons (pre-kidneys) FUSE at inferior poles, make a weird horseshoe shape and are more inferior than normal
What is the cloaca?
Early hindgut with ONE opening for the GI, renal and reproductive tracts
What germ layer does the cloaca originate from?
In which space do the bladder, urethra and rectum develop?
Primitive urogenital sinus
What is the difference between the primitive and definitive urogenital sinuses?
Primitive urogenital sinus forms earlier and has openings for GI, renal and repro tracts
Definitive urogenitial sinus separates from anorectal canal and has urethra and bladder only
What does the definitive urogenital sinus develop into?
Urethra and bladder
How do the mesonephric ducts factor in to the development of the bladder?
Form the posterior wall, which becomes the trigone
What structure, found superior to the bladder, exits in the umbilical cord to drain the bladder of the fetus?
What does the allantois develop into in adults?
closed off space
Problems with the ___ can cause bladder defects in newborns.