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Embryonic Development By  Rachel F., Katelyn M., Marli M., and  Katina R.
What is Embryonic Development? <ul><li>Embryonic Development is when  the embryo is formed and develops. </li></ul><ul><li...
Stages of Embryonic Development <ul><li>Embryonic Development has 4 stages: </li></ul><ul><ul><li>Cleavage </li></ul></ul>...
Cleavage  <ul><li>Cleavage is the first stage of embryonic development.  </li></ul><ul><li>In this stage the cell starts t...
The Different Stages of the Organism.
Patterning <ul><li>This is the second phase. </li></ul><ul><li>During this phase the cells produced by Cleavage organize t...
Differentiation <ul><li>This is the third stage. </li></ul><ul><li>It starts to make specialized structures and has more f...
Growth <ul><li>This is the last stage.  </li></ul><ul><li>In this stage the organism goes through a period of growth.  </l...
The First Trimester  <ul><li>The first trimester is when the cell starts to divide. </li></ul><ul><li>The zygote begins to...
The Second Trimester <ul><li>In the second trimester the baby is becoming more developed.  The baby develops  more. </li><...
The Third Trimester  <ul><li>In the third trimester the baby is developing. </li></ul><ul><li>What is developed: </li></ul...
The End
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Embryonic Development

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A presentation (prepared by middle school life science students) on the process of embryonic development.

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Transcript of "Embryonic Development"

  1. 1. Embryonic Development By Rachel F., Katelyn M., Marli M., and Katina R.
  2. 2. What is Embryonic Development? <ul><li>Embryonic Development is when the embryo is formed and develops. </li></ul><ul><li>It starts with the fertilization of a egg, which after is called a zygote. The zygote goes through rapid divisions. </li></ul><ul><li>The scientific name for it is Embryogenesis. </li></ul>
  3. 3. Stages of Embryonic Development <ul><li>Embryonic Development has 4 stages: </li></ul><ul><ul><li>Cleavage </li></ul></ul><ul><ul><li>Patterning </li></ul></ul><ul><ul><li>Differentiation </li></ul></ul><ul><ul><li>Growth </li></ul></ul>
  4. 4. Cleavage <ul><li>Cleavage is the first stage of embryonic development. </li></ul><ul><li>In this stage the cell starts to divide. Each with the exact genes in the zygote. It is controlled by the mother’s genes. </li></ul><ul><li>In the end of the process of Cleavage the zygote is now called a blastula. </li></ul>
  5. 5. The Different Stages of the Organism.
  6. 6. Patterning <ul><li>This is the second phase. </li></ul><ul><li>During this phase the cells produced by Cleavage organize themselves in layers and masses. </li></ul><ul><li>Parts of the organism that develop: </li></ul><ul><ul><li>Front and the rear. </li></ul></ul><ul><ul><li>Back side and belly side. </li></ul></ul><ul><ul><li>Left and right side. </li></ul></ul><ul><li>During this process three major germ layers are formed : </li></ul><ul><ul><li>Ectoderm </li></ul></ul><ul><ul><li>Mesoderm </li></ul></ul><ul><ul><li>Endoderm </li></ul></ul><ul><li>By the end of this process the zygote’s genes are expressed. </li></ul>
  7. 7. Differentiation <ul><li>This is the third stage. </li></ul><ul><li>It starts to make specialized structures and has more functions. </li></ul><ul><li>The body now produces neurons, skin cells, muscle cells and etc. </li></ul><ul><li>The organized into tissues, the tissues organize into organs, and the organs into systems. </li></ul>
  8. 8. Growth <ul><li>This is the last stage. </li></ul><ul><li>In this stage the organism goes through a period of growth. </li></ul><ul><li>New cells are formed and more extra cellular matrix. </li></ul>
  9. 9. The First Trimester <ul><li>The first trimester is when the cell starts to divide. </li></ul><ul><li>The zygote begins to develop. </li></ul><ul><li>At the end of this trimester the: </li></ul><ul><ul><li>Head is round </li></ul></ul><ul><ul><li>Eyes are closed </li></ul></ul><ul><ul><li>Taste buds are forming </li></ul></ul><ul><ul><li>The internal organs move into the body cavity </li></ul></ul><ul><ul><li>Upper and lower limbs are formed. </li></ul></ul>
  10. 10. The Second Trimester <ul><li>In the second trimester the baby is becoming more developed. The baby develops more. </li></ul><ul><li>At the end of the trimester: </li></ul><ul><ul><li>The baby’s eyes are open. </li></ul></ul><ul><ul><li>The sex is determined. </li></ul></ul><ul><ul><li>The baby weighs 12.5 ounces. </li></ul></ul><ul><ul><li>Bones and muscles are growing steadily. </li></ul></ul>
  11. 11. The Third Trimester <ul><li>In the third trimester the baby is developing. </li></ul><ul><li>What is developed: </li></ul><ul><ul><li>Footprints and fingerprints are formed </li></ul></ul><ul><ul><li>Eyelids open and close </li></ul></ul><ul><ul><li>Brain development grows rapidly </li></ul></ul><ul><li>The baby is born </li></ul>
  12. 12. The End
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