The prenatal circulation of blood is different than the postnatal circulation, mainly because the lungs are not in use. The fetus obtains oxygen and nutrients from the mother through the placenta and the umbilical cord. Blood from the placenta is carried to the fetus by the umbilical vein.
Traits that reflect specific evolutionary lineages and can be informative of evolutionary relationship.
Answer : cathode, protocathode
During an electrochemical reaction, electrons move through the external wire toward the cathode and positive ions in the salt bridge move toward the protocathode.
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