Urinary System Flashcards
Urogenital sinus derivatives
Urinary bladder, urethra, male : prostate and bulbourethral glands, female: vestibule of vagina and vestibular glands.
Name the embryonic germ layer from which the urinary system arises.
Intermediate mesoderm.
Pronephros week and location
Week 4, cervical region.
Mesonephros week and location
Weeks 4-10, functional week 6, and thoracolumbar.
Metanephros week, and developmental components
Week 5, functional week 9/10. Components: ureteric bud and metanephrogenic blastema.
This is the communication between the developing ureteric bud and metanephrogenic blastema.
Reciprocal induction
Kidneys ascend from…
Pelvis to abdomen.
Original blood supply of kidney:
Blood supply shifts to branches of:
Final blood supply:
Common iliac
Dorsal aorta
Rt and lt renal a.
Horseshoe kidney
Poles of kidneys fuse together. Ascent is blocked by inf mesenteric a.
Urorectal septum divides cloaca into…
Urogenital sinus and anorectal canal.
The allantois closes off to form
Urachus
Urachal abnormalities ex
Urachal cyst, urachal sinus, urachal fistula.
Trigone develops from
Distal portions of mesonephric ducts.
Urinary bladder exstrophy results
From failure of ant abdominal wall to close
Renal agenesis is
Ureteric bud fails to develop or reciprocal induction fails in the metanephros.
