ClipArt ETC
"Origin of lungs, liver, and pancreas in the chick. The mesoderm is shaded; the endoderm dark. lg., One of the lungs; St., stomach; l., liver; p., pancreas." -Thomson, 1916

Chick Development

"Origin of lungs, liver, and pancreas in the chick. The mesoderm is shaded; the endoderm dark. lg.,…