• First cells to migrate through Hensen's node -> become pharyngeal endoderm of foregut
• Second group of cells -> prechordal plate mesoderm
• Third group -> chordamesoderm

I'm going to encourage you a little, to help you get started. :)

I am going to encourage you a little, to help you get started :)
Since you looked us up and read the site enthousiastically, I would like to offer you a big discount.