Urogenital Embryology Flashcards
What are the three pre- kidneys that develop prior to the actual kidney.
And what weeks do each form?
Pronephros - week 4 - cervical region
Mesonephros - week 5 - thoracic region
Metanephros - End of week 5 - pelvic region
During mesonephros phase, excertory ducts form which join into a structure that has also formed. this other structure will remain and be important in the genital formation in males, what is it?
Mesonephric duct
The Metanerphros is formed by two distinct parts, what are they?
Ureteric Bud
Metanephric Cap/ Mesenchyme
At the bottom of the mid-gut is the ‘Drain’ which will eventually split into two, what is it called?
Cloaca
What week do the kidneys become functional?
Week 11/ 12
What creates the divide in the cloaca?
Urorectum Septal
What are the two areas that are created by the urorectum septal?
Urogenital sinus
rectum/ anal canal
What week does the urorectum septal occur?
week 4 - 7
Where does the bladder develop from?
what part does not form from here?
Cranial section of the urogenital sinus.
trigone region does not form from here.
What are the two duct systems present in the fetus - both male and female to begin with.
mesonephric duct
Paramesonephric duct
Where to the premordial germ cells derive from?
Epiblast
What cells make AMH?
Sertoli cells
When does the external genitalia start to develop?
week 3
What action does testosterone have on the genital tubercle?
promotes it to elongate into a phallus
What structure guides the gonads down through the inguinal canal?
Gubernaculum
