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Class notes Biology (SBIO000) R173,00
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Class notes

Class notes Biology (SBIO000)

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ALL THE PROCESSES INVOLVED IN FORMING ORGANOGENESIS STAGES AND ALL PROCESSES INVOLVED IN FORMING THE GRASTULA CELLS. EVERYTHING YOU NEED TO KNOW ABOUT THE STAGES.

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  • May 3, 2022
  • 63
  • 2021/2022
  • Class notes
  • Ms malakane
  • All classes
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GASTRULATION
&
ORGANOGENESIS

, Introduction
• As cells of the developing embryo continue to
divide, the blastula enters into a stage known
as gastrulation
• The resulting two or three layered embryo is
called gastrula
• Gastrulation is a process of coordinated cell
migration that results in dramatic
rearrangement of the cells in the embryo

, Gastrulation end results
During gastrulation;
• The cells continue to divide and rearrange to
form primary germ layers
– Ectoderm (outer layer)
– Endoderm (inner layer)
– Mesoderm (middle layer)
• The primary gut is formed

, Primary gut formation
• The blastocoel becomes a flattened cavity
between the ectoderm and endoderm
• Then the primary gut called archenteron
forms
• The archenteron
– Will become the digestive tract of the organism,
– Is lined with endoderm
– Opens to the outside through the blastopore

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