O embrião

Versão original em Espanhol : http://images.google.com.br/imgres?imgurl=https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjHE-5hKx5owmH1mLUKv8-CSvg64lF06xMXqxevx4v_aUrisnyOiqDpy_v5du14FTlT57gjtlL35gN1RdO8CeYi-Ju9Y5CjaVUdlI1gEMmUyswzEg_UHXYSxQ8Ua6zfsJn-F4_Bik0JOMA/s400/charge_celulastronco.jpg&imgrefurl=http://conservadoredai.blogspot.com/2008/05/clulas-tronco-embrionrias-e-seus.html&usg=__BVt0Wi9IF7VqdCRHzDwCr0LHR_0=&h=336&w=353&sz=30&hl=pt-BR&start=57&sig2=6tF5m2MHFH153ubBaoHQWw&um=1&itbs=1&tbnid=Ou6viskiZEc5AM:&tbnh=115&tbnw=121&prev=/images%3Fq%3Dcelulas%2Btronco%26start%3D40%26um%3D1%26hl%3Dpt-BR%26sa%3DN%26ndsp%3D20%26tbs%3Disch:1&ei=BQmxS5bdKoL6lwf1qPiQAQ