Now showing items 1-17 of 17

    • Biological Clocks and the Formation of Human Tooth Enamel 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-03-18)
      Tooth enamel contains relics of its formation process, in the form of microstructures, which indicate the incremental way in which it forms. These microstructures, called cross-striations and striae of Retzius, develop as ...
    • Ectoderm 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-12-03)
      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 which organs and tissues form. As an embryo develops, a single fertilized ...
    • Endoderm 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-11-17)
      Endoderm is one of the germ layers-- aggregates of cells that organize early during embryonic life and from which all organs and tissues develop. All animals, with the exception of sponges, form either two or three germ ...
    • Endothelium 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2014-01-30)
      The endothelium is the layer of cells lining the blood vessels in animals. It weighs more than one kilogram in adult humans, and it covers a surface area of 4000 to 7000 square meters. The endothelium is the cellular ...
    • Epithelium 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2012-11-05)
      Frederik Ruysch, working in the Netherlands, introduced the term epithelia in the third volume of his Thesaurus Anatomicus in 1703. Ruysch created the term from the Greek epi, which means on top of, and thele, which means ...
    • Germ Layers 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-10-03)
      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 tissues. All animals, except perhaps sponges, form two or three germ ...
    • "How do Embryos Assess Risk? Vibrational Cues in Predator-Induced Hatching of Red-Eyed Treefrogs" (2005), by Karen Warkentin 

      Moeller, Karla T. (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-10-17)
      In 'How do Embryos Assess Risk? Vibrational Cues in Predator-Induced Hatching of Red-Eyed Treefrogs' (2005), Karen Warkentin reported on experiments she conducted to see how red-eyed treefrog embryos, Agalychnis callidryas, ...
    • Human Evolution Inferred from Tooth Growth and Development 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-04-05)
      To study human evolution, researchers sometimes use microstructures found in human teeth and their knowledge of the processes by which those structures grow. Human fetusus begin to develop teeth in utero. As teeth grow, ...
    • The inductive capacity of oral mesenchyme and its role in tooth development (1969-1970), by Edward J. Kollar and Grace R. Baird 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-03-18)
      Between February 1969 and August 1970 Edward Kollar and Grace Baird, from the University of Chicago in Chicago, Illinois, published three papers that established the role of the mesenchyme in tooth induction. Drawing upon ...
    • Johann Friedrich Blumenbach (1752-1840) 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2014-01-22)
      In eighteenth century Germany, Johann Friedrich Blumenbach studied how individuals within a species vary, and to explain such variations, he proposed that a force operates on organisms as they develop. Blumenbach used ...
    • Johann Friedrich Meckel, the Younger (1781-1833) 

      O'Connell, Lindsey (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-10-15)
      Johann Friedrich Meckel studied abnormal animal and human anatomy in nineteenth century Germany in an attempt to explain embryological development. During Meckel's lifetime he catalogued embryonic malformations in multiple ...
    • The Meckel-Serres Conception of Recapitulation 

      O'Connell, Lindsey (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-07-10)
      Johann Friedrich Meckel and Antoine Etienne Reynaud Augustin Serres developed in the early 1800s the basic principles of what later became called the Meckel-Serres Law. Meckel and Serres both argued that fetal deformities ...
    • Mesenchyme 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2012-11-05)
      Mesenchyme is a type of animal tissue comprised of loose cells embedded in a mesh of proteins and fluid, called the extracellular matrix. The loose, fluid nature of mesenchyme allows its cells to migrate easily and play a ...
    • Mesoderm 

      MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-11-26)
      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 form. As organs form, a process called organogenesis, mesoderm interacts ...
    • "On the Induction of Embryonic Primordia by Implantation of Organizers from Different Species" (1924), Hilde Mangold's Dissertation 

      Kearl, Megan; MacCord, Kate (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-03-18)
      Hilde Proscholdt Mangold was a doctoral student at the Zoological Institute at the University of Freiburg in Freiburg, Germany, from 1920-1923. Mangold conducted research for her dissertation 'On the Induction of Embryonic ...
    • Some of the Cells that Arise from Animal Gastrulas with Three Germ Layers 

      Michaels, Chinami (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2014-08-21)
      From a developing embryos three primary germ layers, ectoderm (green), mesoderm (pink) and endoderm (yellow), a variety of differentiated cell types and organ systems arise, far more than are shown here. The three primary ...
    • Thomas Henry Huxley (1825-1895) 

      Hauserman, Samantha (Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia., 2013-11-26)
      In nineteenth century Great Britain, Thomas Henry Huxley proposed connections between the development of organisms and their evolutionary histories, critiqued previously held concepts of homology, and promoted Charles ...