Quicktime Development Animation - Mesoderm

From Embryology
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Mesoderm Development

  • This animation shows the migration of mesoderm throughout the embryonic disc during gastrulation.
  • The pink arrow show how mesodermal cells spread out between the ectoderm and endoderm layers, forming the third (middle) layer of the trilaminar embryo.
  • Axial process - the arrow running from the primitive node upward is the axial process which will later form the notochord.
  • 2 regions where no mesoderm is found, at the upper and lower ends of the gastrointestinal tract.
  1. cranial (top) - buccopharyngeal membrane
  2. caudal (bottom) - cloacal membrane.
  • Prechordal plate - lies above the buccopharyngeal membrane and is the cardiogenic mesoderm, that will form the heart.