2. Renal embryology (Kidney, Bladder, Suprarenal Gland) Flashcards
What is the first structure to produce urine in an early fetus?
The mesonephros
From where is the collecting duct derived?
The collecting duct is derived from the ureteric bud.
Why does a fetus need to have a well-developed suprarenal gland?
Because of the requirement of DHEA to continue the pregnancy
What gives rise to the ureteric bud?
The caudal end of the mesonephric duct
What gives rise to the trigone?
The mesonephric duct growing downwards
What gives rise to the ureter, renal pelvis, and major and minor calyxes?
The ureteric bud
When do we see the appearance of the pronephros?
When do we see it degenerate?
Early week four
It degenerates by day 24 or 25
When do we expect to see the mesonephros producing urine?
From weeks 6 to 10
From where is the nephron derived?
The nephron is derived from the metanephrogenic blastema, which forms metanephric tubules, which become the nephron.
What gives rise to Bowman’s capsule?
The metanephric blastema
What is the pathway of structures leading to the formation of what will become the adult kidney?
(Hint: 5 structures)
Urogenital ridge
Nephrogenic cord
Pronephros
Mesonephros
Metanephros
What is derived from the pelvic part of the urogenital sinus?
The neck of the bladder, as well as:
in males, the prostatic urethra
in females, the entire urethra
What gives rise to the cortex of the suprarenal glands?
Epithelial cells from the intraembryonic coelom
What gives rise to the suprarenal medulla?
Neural crest cells
