Embryonic development & stem cells bits & pieces, not really in your textbook.

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Presentation transcript:

Embryonic development & stem cells bits & pieces, not really in your textbook

Once upon a time… Engraving by Hartsoecker, 1694

But, of course, it takes two gametes for fertilization What is an embryo?

Two major phases of embryonic development Cleavage Gastrulation

Cleavage phase

blastocyst

Gastrulation phase

After gastrulation Also called organogenesis

Mitosis & apoptosis

Cell differentiation

Stem cells are undifferentiated cells

Stem cell differentiation

Two types of stem cells Embryonic Adult

Stem cells & research Embryonic Adult

There are technical hurdles… For stem cell therapies to be successful, stem cells need to...

There are ethical hurdles… The harvesting of embryonic stem cells destroys the embryo And/but...