Flashcards in Embryology Deck (20):
Endoderm forms what in the urinary system?
Most of bladder
Three pairs of kidneys
In the cervical region and does very little, contains: nephrotomes
Forms and thoracic and lumbar regions
Forms Bowmans capsule and the filtrate of the glomeruli
Drains into the mesonephric duct
Mesonephric (wolffian) duct
Extends caudaly and empties into the Cloaca (future urogenital sinus)
Creates outgrowths for the ureters
Forms the vas deferens in males and degenerates in females
Forms the metanephric blastema and urethric bud which form the kidneys
The cloaca divides into...
Parts of the urogenital sinus
-bladder and vesicle
(in males the prosthetic and membranous urethra)
(penis in males and vestibule of vagina in females)
Genital ridges form from:
Splanchnic lateral plate mesoderm
The primitive sex cords become the seminiferous tubules and join with the mesonephric duct which becomes the vas deferens and the epididymis
The prostate and Bulbourethral glands form from what layer?
Endoderm of the urogenital sinus
The primitive sex cords degrade and are followed by secondary sex cords or cortical cords these cords form oogonia. The mesonephric duct degrades and the paramesonephric duct develops.
Forms uterine tubes and uterovaginal canal
Two layers of the trophoblast
Definitive yolk sac
Part of the primary yolk sack that degenerates