4_week_embryo-1266px-(https—commons.wikimedia.org-wiki-File-4_week_embryo.jpg)-Bonnie-Urquhart-Gruenberg[CC-BY-SA4.0]

A colored line drawing of a four week old embryo with one to two word explanations pointing to each part of it

A colored line drawing of a four week old embryo with one to two word explanations pointing to each part of it.