Queried GO terms:

  idGO:0045446   Detailed information
  nameendothelial cell differentiation
  namespacebiological_process
  def"The process in which a mesodermal angioblast acquires specialized features of an endothelial cell, a thin flattened cell. A layer of such cells lines the inside surfaces of body cavities, blood vessels, and lymph vessels, making up the endothelium." [CL:0000115, GOC:go_curators]
  is_aGO:0030855 ! epithelial cell differentiation
  relationshippart_of GO:0003158 ! endothelium development

No monarch genes has this GO term.