Term Name:	tertiary chorionic villus
Synonyms:
Definition:	Tertiary chorionic villi contain embryonic blood vessels that develop from mesenchymal cells in the loose connective tissue core. These blood vessels connect up with vessels that develop in the chorion and connecting stalk and begin to circulate embryonic blood about the third week of development in humans.
Ontology:	Uberon Ontology [UBERON:0009995]