10.What is the difference between vasculogenesis and angiogenesis? Where does vasculogenesis occur?11. Describe brieflyextraembryonic vasculogenesis.
12. Describe brieflyintraembryonic vasculogenesis.13.What are the two models for the vascular tube lumen formation? Explain. (you can usediagrams.)14.Which signaling pathway(s) controls angioblast specification?15.During the formation of the circulatory system, arterial and venous capillaries connect exclusively to each other. How is this accomplished?