The blood is pumped down to the ventricles, which are larger pumping chambers which must propel blood out of the heart therefore, they contain more muscle tissues than atria do. On the right side, the right ventricles pumps blood out through the pulmonary arteries to the lungs, which isn't a long distance .
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Hi Sophonie
Because the ventricles need to pump blood to the entire body
C.All electrons
D.Ions
Answer: a
Explanation: