Development Of Renal System Flashcards
Where does the renal and genital system develop from
Intermediate mesoderm (between paraxial and lateral plate)
What is the intermediate mesoderm
Ridge of tissue on the posterior abdominal wall
What is the cloaca
Common cavity for urogenital and digestive systems
What is the allantois
An extension of the cloaca into the umbilicus
What 2 things does the urorectal septum divide the cloaca into
Urogenital sinus
Anal canal
What are the 3 parts of the urogenital sinus and what do they develop into
Upper - bladder
Middle - prostate and membranous urethra in males
Lower - phallic part (differs between male and female)
What happens when the allantois obliterates
Remnant is the urachus which connects the bladder to the umbilicus
What are the 3 overlapping kidney systems formed in a cranial to caudal sequence
Pronephros
Mesonephros
Metanephros
What is the pronephros
Originates in the cervical and develops in week 4
Disappears by week 5
It is non functional
What is the origin of the mesonephros
Thoracic and lumbar intermediate mesoderm
What does the mesonephros consist of
Consists of a ridge of tissue and the mesonephric duct
What happens to tubules and mesonephric duct in females
They degenerate
What do the excretory tubules and capillaries give rise to
Tubules - bowman’s capsule
Capillaries - glomerulus
What happens to the tubules and mesonephric duct in males
A few remain and form part of the genital system
Mesonephric duct - vas deferens
Tubules - efferent ducts of testis
Where does the metanephros develop
Definite kidney develops in the Pelvic region