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Blood from the umbilical vein passes through the liver and into the ____________, which carries blood into the heart, specifically into the chamber called the ______________. In one circuit of blood flow, blood goes from this chamber into the right ventricle and out of the _________. A branch from this vessel, the _______ (present only in fetal circulation), carries most of this blood into the dorsal aorta. The dorsal aorta passes through the body, giving off branches to all organs of the body. Two large branches located near the tail lead into the umbilical cord and are called the ______.
An alternate route carries blood from the right atrium through a fetal hole called the ___________- into the heart chamber, the _______. From this chamber, blood next goes into the left ventricle and out the _________. Branches of this vessel lead to the head.