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Germ Layers
By: Kate MacCord
| Published: Sep 17, 2013
A germ layer is a group of cells in an embryo that interact with each other as the embryo develops and contribute to the formation of all organs and…
GastrulationEmbryologyCell differentiationEmbryosCells
Inducing Fertilization and Development in Sand Dollars
By: Karen Wellner
| Published: Jun 24, 2010
Sand dollars are common marine invertebrates in the phylum Echinodermata and share the same class (Echinoidea) as sea urchins. They have served as…
Sand DollarsFertilizationInvertebrates
Mesoderm
By: Kate MacCord
| Published: Nov 26, 2013
Mesoderm is one of the three germ layers, groups of cells that interact early during the embryonic life of animals and from which organs and tissues…
MesodermGastrulationCell differentiationCellsTissues
Endoderm
By: Kate MacCord
| Published: Nov 17, 2013
Endoderm is one of the germ layers-- aggregates of cells that organize early during embryonic life and from which all organs and tissues develop.…
GastrulationEmbryosEmbryologyCellsTissues
Ectoderm
By: Kate MacCord
| Published: Dec 02, 2013
Ectoderm is one of three germ layers--groups of cells that coalesce early during the embryonic life of all animals except maybe sponges, and from…
EmbryosEmbryologyGastrulationCellsTissues
Ernest Everett Just (1883-1941)
By: Karen Wellner
| Published: Jun 16, 2010
Ernest Everett Just was an early twentieth century American experimental embryologist involved in research at the Marine Biological Laboratory (MBL)…
FertilizationBiographyInvertebrates
Edwin Stephen Goodrich (1868-1946)
By: Joe Brinkman
| Published: Dec 30, 2014
Edwin Stephen Goodrich studied the structures of animals in England during the nineteenth and twentieth centuries. Goodrich studied how animals…
ZoologyHomology (Biology)InvertebratesEvolution