why is the heart the first organ to form during pregnancy?

Subject: why is the heart the first organ to form during pregnancy?

Date: Wed Jun 20 19:44:51 2007
Posted by josh
Grade level: 10-12 School: No school entered.
City: No city entered. State/Province: No state entered. Country: No country entered.
Area of science: Development
ID: 1182393891.Dv

Message:


i would also like to know why or why not is double feretilization common, 
resulting in triplets or something like that. i would also like to know if 
there are any good websites or books about the development of embryos and 
fetuses and the different cases of twins, triplets, quadruplets, etc. and 
vanishing twins syndrome, and etc. i would also like to know if there has or 
could ever be twins that are genetically identical (100%) and have identical 
fingerprints?

Re: why is the heart the first organ to form during pregnancy?

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