Embryology Flashcards
Intermediate mesoderm
kidneys
Ureter
Bladder
Endoderm forms what in the urinary system?
Most of bladder
Urethra
Three pairs of kidneys
Pronsphros
Mesonephros
Metanephros
Pronephros
In the cervical region and does very little, contains: nephrotomes
Mesonephros
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
Metanephros
Forms the metanephric blastema and urethric bud which form the kidneys
Ureteric bud
Renal pelvis
Major calices
Minor calices
Collecting ducts
Metanephric blastoma
Forms nephrons
The cloaca divides into…
Urogenital sinus
Anorectal canal
Parts of the urogenital sinus
-bladder and vesicle
-pelvic part
(in males the prosthetic and membranous urethra)
-phallic part
(penis in males and vestibule of vagina in females)
Bladder defects
Urachal fistula
Urachal sinus
Urachal cysts
Genital ridges form from:
Intermediate mesoderm
Splanchnic lateral plate mesoderm
Testis development
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
