https://uz.wikipedia.org/wiki/Allantois
Allantois - Vikipediya
vikipediya
https://pmc.ncbi.nlm.nih.gov/articles/PMC19130/
Blood-borne seeding by hematopoietic and endothelial precursors from the allantois - PMC
Until now the allantois has not been considered as a hematopoietic organ. Here we report experimental evidence demonstrating the in situ emergence of both...
blood borne