This chapter brought back so many fond memories of chapter three. This chapter discussed the complex ideas of bodily organization. However, it seemed to have so many connections to chapter three. I suppose that since both chapters divulgei nto the ideas of DNA, they would have several things in common. The most apparent seemed the correlation between Noggin and BMP-4, and Sonic hedgehog and ZPA. Both work together to either turn off or on and create a specific part of the body. ZPA and Sonic Hedgehog could result in doubling our digits, and Noggin and BMP-4 can do the same thing to our bodies. It is interesting how our genes work together to make sure that our bodies develop in an orderly fashion. This is something that captivates me, aside from the horribly extensive embryotic research involved.
In addition, it was nice to know that the numbver three is not only important in literature, but in our bodies as well. The three layers of tissue that later form the endoderm, mesoderm, and ectoderm are obvious. This was the easiest thing to grasp; however, it supports the idea that our bodies develop in an orderly fashion. The one thing that confused me was the organizer.
If the organizer directs our bodies into creating itself, than why do our bodies have cells that form three specific tissues. I think I can answer my own question, our bodies start off as a cluster of cells that all hold the organizer. Thus, separating the cells creates twins. However,as our embryos mature the organizer directs specific cells around to form in specific ways.
This chapter was a bit difficult to comprehend, but with careful reading I was able to decipher the cryptic terminology in this bloody book. Au Revoir.
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