Fig. 1. Hematopoietic organs in mouse and human embryos. An illustration of
(A) a mouse and (B) a human embryo, showing the hematopoietic
organs at 11 days and 5 weeks of gestation, respectively (yellow, yolk sac;
green, dorsal aorta; red, fetal liver; blue, umbilical vessels and fetal
vasculature in the placenta). The hematopoietic function of the human placenta
has not yet been experimentally proven. AGM, aorta-gonad-mesonephros
region.