| Week
|
Carnegie Stage
|
Feature
|
| Week 5
|
14
|
Carnegie stage 14 to 17
appears as a bulge in the dorsal mesogastrium. Mesothelium pseudostratified.
|
|
|
15
|
|
| Week 6
|
16
|
Mesothelium (pseudostratified} replaced with high columnar cells and then low columnar cells.
|
|
|
17
|
Basement membrane present after this stage.
|
| Week 7
|
18
|
Hematopoietic cells detected.
|
| Week 8
|
20
|
Spleen is now apparent. Mesenchymal cells differentiated from cells in dorsal mesogastrium. Sinus and hilus formation after this stage.
|
|
|
23
|
Arteries and veins parallel entries at this stage.
|
| Human data.[1] Links: spleen | Kyoto Collection | Timeline human development
|
