Urinary system embryology Flashcards
What germ layer gives rise to the urinary system?
Intermediate mesoderm
What region of the intermediate mesoderm gives rise to the urinary system?
Urogenital ridge
What are the 3 systems that form the kidney?
Prosenephros, mesenephros, metanephros
In which week does the prosenephros form?
4th week
What does the prosenephros form?
Nothing- regresses completely by the end of week 4
What is the role of the mesonephros?
Primary excretory system in the embryo up to 2 months
What forms the definate kidney?
Metanephros
At what week does the metanephros become functional?
12th week
What are the three parts of the urogenital sinus?
The upper part
The pelvic part
The phallic/caudal part
What does the upper part of the urogenital sinus form?
The bladder
What does the pelvic part of the urogenital sinus form?
The urethra, some of the female reproductive tract, and the prostatic and membranous urethra in males
What does the phallic/caudal part of the urogenital sinus form?
Part of the female reproductive tract and the spongy urethra in males
Where does the prosenephros develop?
The cervical region
Where does the mesenephros develop?
The thoracic and lumbar region
Where does the metenephros develop?
The pelvic region