Here's why you aren't built like a lobster.
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Our bodies are mirror images of lobsters and other arthropods from back to belly. We've know since the early
19th century that our guts and nervous systems are inverted from theirs, but only recently has molecular biology shown us why. Here's the evolutionary tale about a worm doing the backstroke and why your guts are on your front
This is part 2 of 3 in my series about how our bodies evolved to look like they do.
Check out the others:
Part 1 - https://www.youtube.com/watch?v=qdNE4WygyAk
Part 3 - Coming Friday!
More info:
Dorsoventral inversion: http://en.wikipedia.org/wiki/Inversion_(evolutionary_biology)
Geoffrey Saint-Hilaire: http://en.wikipedia.org/wiki/%C3%89tienne_Geoffroy_Saint-Hilaire
Common animal body plan between protostomes and deuterostomes: http://www.hhmi.ucla.edu/derobertis/EDR_MS/Evo-Devo_page/EVO-DEVO
.html
How we know that our body plan came later: http://scienceblogs.com/pharyngula/
2006/01/12/hemichordate-evodevo/
Step by step along the evolutionary tree:
http://tolweb.org/Bilateria/
2459
http://en.wikipedia.org/wiki/Bilateria
http://en.wikipedia.org/wiki/Deuterostome
http://en.wikipedia.org/wiki/Protostome
http://en.wikipedia.org/wiki/Urochordata
http://en.wikipedia.org/wiki/Chordate
http://en.wikipedia.org/wiki/Cephalochordata
http://en.wikipedia.org/wiki/Craniate
http://en.wikipedia.org/wiki/Gnathostomata
Evolutionary timeline of vertebrates: http://www.utexas.edu/news/2008/03/03/tree/
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- published: 16 Jul 2014
- views: 205707