Endoderm
Julia Barlow Platt's Embryological Observations on Salamanders' Cartilage (1893)
In 1893, Julia Barlow Platt published her research on the origins of cartilage in the developing head of the common mudpuppy (Necturus maculosus) embryo. The mudpuppy is an aquatic salamander commonly used by embryologists because its large embryonic cells and
Some of the Cells that Arise from Animal Gastrulas with Three Germ Layers

The Process of Gastrulation in Frog Embryos

