an embryo floating on a blue background


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By: Mary E. Sunderland | Published: May 09, 2008

The term morphogenesis generally refers to the processes by which order is created in the developing organism. This order is achieved as…


Hartsoeker's Homunculus Sketch from Essai de Dioptrique

By: Cera R. Lawrence | Published: Aug 14, 2008

This embryology image is a pencil sketch by Nicolaas Hartsoeker, published as part of his 1694 French-language paper entitled Essai de Dioptrique, a…


Christian Heinrich Pander (1794-1865)

By: Stephen C. Ruffenach | Published: Jul 22, 2009

Christian Heinrich Pander, often remembered as the father of embryology, also explored the fields of osteology, zoology, geology, and anatomy. He was…


"Hybrids and Chimeras: A report on the findings of the consultation" by the Human Fertilisation and Embryology Authority in October, 2007

By: Robert Jason S., Sarah Taddeo | Published: Nov 22, 2014

In 2007, the Human Fertilisation and Embryology Authority in London, UK, published Hybrids and Chimeras: A Report on the Findings of the Consultation…

LiteratureChimerismHuman reproductive technologyHuman CloningEmbryonic Stem Cells

Ernst Haeckel's Biogenetic Law (1866)

By: M. Elizabeth Barnes | Published: May 03, 2014

The biogenetic law is a theory of development and evolution proposed by Ernst Haeckel in Germany in the 1860s. It is one of several recapitulation…

EvolutionDevelopmental BiologyEmbryologyAnatomy, Comparative

Franz Julius Keibel (1861-1929)

By: M. Elizabeth Barnes | Published: Jun 21, 2014

Franz Keibel studied the embryos of humans and other animals in Europe at the turn of the twentieth century. He lived and worked in several different…


Benjamin Harrison Willier (1890-1972)

By: Karen Wellner | Published: Jun 28, 2010

Benjamin Harrison Willier is considered one of the most versatile embryologists to have ever practiced in the US. His research spanned most of the…


John Philip Trinkaus (1918-2003)

By: Ellen M. DuPont | Published: May 31, 2010

John Philip Trinkaus studied the processes of cell migration and gastrulation, especially in teleost fish, in the US during the twentieth century.…


William Harvey (1578-1657)

By: Angel Lopez | Published: Jun 18, 2010

Renowned physician and scientist William Harvey is best known for his accurate description of how blood circulates through the body. While his…

PeopleBlood CirculationBiographycirculation

Edwin Grant Conklin (1863-1952)

By: D. Brian Scheurmann | Published: Jan 22, 2009

Edwin Grant Conklin was born in Waldo, Ohio, on 24 November 1863 to parents Nancy Maria Hull and Dr. Abram V. Conklin. Conklin's family was very…

PeopleCell LineageBiography

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