18 Questions
What part of the cloaca develops into the lower part of the rectum and upper part of the anal canal?
Anorectal canal
What forms the epithelium of the urinary bladder?
Cranial part of vesicourethral canal
What forms the lower part of the urethra in females?
Pelvic part of urogenital sinus
What forms the spongy urethra in males?
Phallic part of urogenital sinus
What forms the prostatic glands?
Caudal part of vesicourethral canal
What forms the lower part of the vagina in females?
Phallic part of urogenital sinus
What is the derivative of the caudal part of the mesonephric duct in males?
Seminal vesicle
What is the fate of the mesonephric duct in females?
Forms some parts of the urinary system
What is the origin of the ureteric bud?
Caudal part of mesonephric duct
What happens to the openings of the ureteric bud and mesonephric duct during kidney ascent?
They move in opposite directions
What is the derivative of the part of the mesonephric duct cranial to the seminal vesicle in males?
Epididymis and vas deferens
What is the remaining part of the mesonephric duct in females?
Duct of epoophoron (Gartner's duct)
What is the name of the cord that projects from the intermediate mesoderm, from which the urinary system develops?
Nephrogenic cord
At what stage of development does the pronephros degenerate?
End of 4th week
What is the name of the duct that the mesonephric tubules open into?
Wolffian duct
Which part of the urogenital ridge develops into the genital system?
Medial part
What is the name of the permanent kidney that develops from the nephrogenic cord?
Metanephros
What is the fate of the caudal tubules in males?
They form the duct system of the testis
Learn about the development of the urinary system from the intermediate mesoderm, formation of the nephrogenic cord, and the series of kidneys that develop from it. Understand the pronephros, the initial kidney that develops in the cervical region, and its excretory tubules.
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