ANAT 1502 Week 3 & 4 - Gastrulation Bilaminar disc...

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Gastrulation • Bilaminar disc becomes trilaminar – ectoderm – mesoderm – endoderm • primitve streak • precordal plate • notocord Monday, July 12, 2010
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Primitive Streak • Produces mesoderm • Primitive node • Primitive groove • Primitive pit • Disappears by week 4 Monday, July 12, 2010
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• Fig. 5 -2 from Moore, K.L., and T.V.N. Persaud. 2003. Before We are Born: Essentials of Embryology and Birth Defects . 6 th ed. Elsevier Inc. p.47. Monday, July 12, 2010
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• Fig. 5 - 3 from Moore, K.L., and T.V.N. Persaud. 2003. Before We are Born: Essentials of Embryology and Birth Defects . 6 th ed. Elsevier Inc. p.48. Monday, July 12, 2010
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Notocord • Mesenchymal cells cranial to the primitive node and pit • cranial up to precordal plate • rigid • basis for the development of the axial skeleton • induction Monday, July 12, 2010
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Persaud. 2003.
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ANAT 1502 Week 3 & 4 - Gastrulation Bilaminar disc...

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