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Somites: Formation and Role in Developing the Body Plan
By: Corinne DeRuiter
| Published: Oct 20, 2010
Somites are blocks of mesoderm that are located on either side of the neural tube in the developing vertebrate embryo. Somites are precursor…
Somatic cellsSomites
Nicole Le Douarin and Charles Ordahl's Experiments on the Developmental Lineages of Somites
By: Corinne DeRuiter
| Published: Jan 31, 2011
Through various studies developmental biologists have been able to determine that the muscles of the back, ribs, and limbs derive from somites.…
SomitesExperimentsSomatic cellsVertebrates
Fate Map
By: Corinne DeRuiter
| Published: Sep 08, 2010
Early development occurs in a highly organized and orchestrated manner and has long attracted the interest of developmental biologists and…
Cell Lineage
Fate Mapping Techniques
By: Corinne DeRuiter
| Published: Nov 19, 2010
For more than 2000 years, embryologists, biologists, and philosophers have studied and detailed the processes that follow fertilization. The…
TechnologyCell Lineage
Gastrulation in Gallus gallus (Domestic Chicken)
By: Corinne DeRuiter, Maria Doty
| Published: Jun 21, 2011
Gastrulation is an early stage in embryo development in which the blastula reorganizes into three germ layers: the ectoderm, the mesoderm, and the…
GastrulationChicks
Hensen's Node
By: Maria Doty, Corinne DeRuiter
| Published: Jun 21, 2011
A node, or primitive knot, is an enlarged group of cells located in the anterior portion of the primitive streak in a developing gastrula. The node…
GastrulationChicks
Parasitic Twins
By: Corinne DeRuiter
| Published: Aug 16, 2011
Parasitic twins, a specific type of conjoined twins, occurs when one twin ceases development during gestation and becomes vestigial to the fully…
Twins, ConjoinedReproductionFetusCongenital DisordersHuman Development
Fetus in Fetu
By: Corinne DeRuiter
| Published: May 30, 2012
Fetus in fetu is a rare variety of parasitic twins , where the developmentally abnormal parasitic twin is completely encapsulated within the torso of…
FetusEmbryosfetal developmentPregnancyFetus--Abnormalities
Twin-to-Twin Transfusion Syndrome
By: Corinne DeRuiter
| Published: Aug 16, 2011
Twin-to-Twin Transfusion Syndrome (TTTS) is a rare placental disease that can occur at any time during pregnancy involving identical twins. TTTS…
Fetofetal TransfusionReproductionFetusCongenital DisordersHuman Development
Diprosopus (Craniofacial Duplication)
By: Corinne DeRuiter
| Published: Aug 16, 2011
Diprosopus is a congenital defect also known as craniofacial duplication. The exact description of diprosopus refers to a fetus with a single trunk,…
Craniofacial AbnormalitiesReproductionFetusCongenital Disorders