Development of the urogenital system Flashcards
What does the intermediate mesoderm form?
It forms the urogenital ridge which will then give rise to the nephrogenic cord
and the gonadal ridge which gives rise to the male/female genital tract
What does the medially positioned gonadal ridge give rise to?
ovary/testis (male/female genital tract)
Where does the pronephros develop from?
The neck region
Where does the mesonephros develop from?
thorax/lumbar region
Where does the metanephros develop from?
The pelvic region
Where does the kidney develop from in the mammal?
The metanephric region
What are the two sources that the metanephros develops from?
The Ureteric bud or the metanephrogenic bud
Where does the ureteric bud grow out of?
Grows out of the mesenephric duct and eventually develops into the ureter, renal pelvis and collecting ducts
What does the metanephrogenic mass form?
Outer part of the mass forms the capsule and interstitium of the kidney, the inner parts form the nephrons
What does the urorectal septum divide the cloaca into?
Dorsal, Rectum, anal canal and anal membrane
What is the trigone?
triangular region located in the dorsal wall of the bladder neck formed by longitudinal smooth muscle from the ureters
Where do the gonads develop from?
gonadal ridge which is a thickening of the intermediate mesoderm
What are the two types of cells that the gonad contains?
Supporting cells and germ cells
What do the supporting cells form?
cellular cords
What do germ cells proliferate and migrate inside of
The gonadal cords so that they can be surrounded by supporting cells
