What is the origin of the alantoide and what is its function? I - The allantois arises from the evagination of the roof of the yolk sac. II - The ...
What is the origin of the alantoide and what is its function?
I - The allantois arises from the evagination of the roof of the yolk sac.
II - The allantois is responsible for the formation of blood vessels that form the umbilical vein and artery.
III - The allantois is a structure that connects the baby's belly to the placenta.
IV - The allantois is responsible for the formation of the digestive tube and respiratory system.
a) I and II are correct.
b) II and III are correct.
c) I and IV are correct.
d) II and IV are correct.
e) III and IV are correct.
I - The allantois arises from the evagination of the roof of the yolk sac.
II - The allantois is responsible for the formation of blood vessels that form the umbilical vein and artery.
III - The allantois is a structure that connects the baby's belly to the placenta.
IV - The allantois is responsible for the formation of the digestive tube and respiratory system.
a) I and II are correct.
b) II and III are correct.
c) I and IV are correct.
d) II and IV are correct.
e) III and IV are correct.
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Ed 
A alternativa correta é a letra A) I e II estão corretas. A alantoide é uma estrutura presente em embriões de répteis, aves e mamíferos, incluindo os humanos. Ela surge a partir da evaginação do teto do saco vitelínico e é responsável pela formação dos vasos sanguíneos que formam a veia e a artéria umbilicais, que conectam o embrião à placenta. Portanto, as afirmativas I e II estão corretas. As afirmativas III e IV estão incorretas, pois a alantoide não está relacionada à conexão do bebê com a placenta, nem à formação do tubo digestivo e do sistema respiratório.
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