179- development Flashcards
What are the three primordial tissues from which the UG system is derived?
intermediate mesoderm, splanchnopleure of hindgut, somatopleure (genital tubercle)
three sequential kidneys
pronephros, mesenephros, metanephros
describe the mesonephros
has tubules and (wolffian) duct. Is the embryonic ureter. The metanephric diverticulum (ureteric bud) originates from the duct.
What does the paramesonephric duct form? AKA? What about the mesonephric duct?
uterus, uterine tubes, upper vagina. mullerian duct
vas deferens
two primordia of the kidney parenchyma
metanephric mesoderm= kidney nephrons up through DCT
ureteric buds= ureters, pelvis, calyces, collecting tubules
what happens with horseshoe kidney and where
ureteric buds fuse and hook around inferior mesenteric artery
urorectal septum divides what and what are the component parts
UG sinus (bladder, pelvic parts, phallic parts) and rectum
the allantois becomes the ____. But it may persist as___
urachus (fibrous cord)
cyst, sinus, fistula
at what age are the sex primordia identical
8 week
primary sex cords become___. Secondary become___
seminiferous tubules
ovarian follicles
what does the UG sinus become?
vestible and lower vagina in female, most of the penile urethra in male
the labia majora are equivalent to the____
scrotum
why does dan pee out the bottom of penis? What is it called?
his UG folds didnt fuse. Called hypospadius or Reinhardt Syndrome
why do you get a double uterus
paramesonephric ducts dont fuse
