An opening between the right and left atria that's present in fetal mammals is the A. ductus arteriosus. B. foramen ovale. C. umbilical fistula. D. portosystemic shunt.

An opening between the right and left atria that's present in fetal mammals is the A. ductus arteriosus. B. foramen ovale. C. umbilical fistula. D. portosystemic shunt.

asked Nov 19, 2020 47.1k views

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