The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. Fig. 133. — Circulation in the embryo and the yolk-sac. Stage of about 16 s; from below.
Figure 1 from Erythropoiesis: development and differentiation. | Semantic Scholar
Ontogeny of the mouse hematopoietic system. (A) During gastrulation of... | Download High-Resolution Scientific Diagram
Yolk sac vessels, blood islands, and placenta. Sections of yolk sac... | Download Scientific Diagram
Development of the Heart and Cardiovascular System