angioblast
noun
an·gio·blast
ˈan-jē-ə-ˌblast 
1
: one of the extraembryonic mesenchyme cells that differentiate into the endothelium of the embryonic blood vessels
2
: the mesenchymal tissue that gives rise to embryonic blood cells and blood vessels
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“Angioblast.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/angioblast. Accessed 15 Dec. 2024.
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