Urogenital System Flashcards
The “Head Kidney”
Proneprhroi
What somite level does the genital and urinary system extend from in the paraxial mesoderm?
7th to 28th somite level
What are the 3 different types of kidneys?
Pronephroi, Mesonephroi, metanophroi
When does the development of the kidneys begin?
3rd week
This kidney has very little function, develops from the 7th - 10th somite level, degenerates at the 4th week and has four pairs of tubules
Pronephroi
What type of tubule and glomerulus does the Pronephroi have?
Open tubule external glomerulus
What type of tubule and glomerulus does the mesonephroi have?
Closed tubules and internal glomerulus
What somite level does the mesonophroi derive from
10-26th
How many pairs of tubules are located in the mesonophroi have?
38
What is the significance of the Mesonophroi have in males?
They remain in the genital duct system
what level of kidney is known as the permanent kidney?
Metanophroi
How many nephrons are located in each metanophroi?
2 million
When does the metanophroi develop?
5th week
The metanophroi develops from what 2 sources?
Uteric Bud and Metanephrogenic Blastema
What somite levels is the metanophroi located?
26-28
What is a mesodermal mass that divides the cloacal
Cloacal Septum
In the fetus the allantois is called?
Urachus
In adults the medial umbilical ligament is derived from what
Allantois
Type 1 congenital cystic kidney is found in?
Infants
What trisomy is type 3 Congenital Cystic Kidney found in?
13-15, 18, 21, 22
This structure is covered by coelum epithelium and inner mass is made up of mesenchyme
Genital Ridge
This structure develops the uterus and vagina?
Paramesonepheric Duct
In males what happens to the cortex and medulla of the indifferent gonad?
Cortex: Regress
Medulla: Develop
In females what happens to the cortex and medulla of indifferent gonad?
Cortex: Develops
Medulla: Regress
This structure allows for the bypassing of lungs
Ductus arteriosus
This structure opens into the left ventricle
Cavum Aorticum
What opens into the right ventricle
Cavum Pumonare
