The kidneys develop along a cranio-caudal gradient. Typically, the development passes through three stages:
- Pronephros
- Mesonephros
- Metanephros
In principle, for all three developmental stages with similar designations, the same embryonic anlage - the intermediate mesoderm - is involved.
The term "holonephros" can thus be employed to designate all the parts of the urinary system that arise from it. The first two developmental stages have a transitory character and the definitive kidneys actually develop from the metanephros stage.
|
|
Color code
for the
urinary system
module
|
Urine excreting system:
yellow-beige-
orange
|
Urine forming system:
pink-lilac-violet |
|
|