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6. The tiny ball now called a begins to divide into the become the placenta. has grown to around 100 cells but it of cells is destined to 7. These inner cells are all identical; they are dividing rapidly and are known as 8. During the third week the embryonic ball folds and forms the The top of the tube is the head and the trunk body stretches down. 9. cells will form on day 15 10. One of the first recognizable organs to form is the without a heart there is no way of spreading around the food and oxygen the embryo needs to flourish (happens on day 22!) 11. After 8 weeks the embryo is known as a offspring. 12. The generates the nutrients and blood cells for the embryo during the first few weeks, but then shrivels away. 13. The placenta filters out many harmful substances but it can't stop everything:

          6. The tiny ball now called a
begins to divide into the
become the placenta.
has grown to around 100 cells but it
of cells is destined to
7. These inner cells are all identical; they are dividing rapidly and are known as
8. During the third week the embryonic ball folds and forms the
The top of the tube is the head and the trunk body stretches down.
9.
cells will form on day 15
10. One of the first recognizable organs to form is the
without a
heart there is no way of spreading around the food and oxygen the embryo needs to
flourish (happens on day 22!)
11. After 8 weeks the embryo is known as a
offspring.
12. The
generates the nutrients and blood cells for the embryo
during the first few weeks, but then shrivels away.
13. The placenta filters out many harmful substances but it can't stop everything:

6. The tiny ball now called a
begins to divide into the
become the placenta.
has grown to around 100 cells but it
of cells is destined to
7. These inner cells are all identical; they are dividing rapidly and are known as
8. During the third week the embryonic ball folds and forms the
The top of the tube is the head and the trunk body stretches down.
9.
cells will form on day 15
10. One of the first recognizable organs to form is the
without a
heart there is no way of spreading around the food and oxygen the embryo needs to
flourish (happens on day 22!)
11. After 8 weeks the embryo is known as a
offspring.
12. The
generates the nutrients and blood cells for the embryo
during the first few weeks, but then shrivels away.
13. The placenta filters out many harmful substances but it can't stop everything:

Added by Omar P.

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