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Correct Answer: B) Red blood cells.
Correct Answer: A) Blood vessels.
Correct Answer: D) Cardiovascular.
Correct Answer: C) Valves closing.
Correct Answer: C) Waste.
Correct Answer: C) Dogs, cats and mice.
Correct Answer: A) Heart.
Correct Answer: B) Right atrium.
Correct Answer: A) Left Atrium.
Correct Answer: D) The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows.
Correct Answer: D) Serum.
Correct Answer: C) Veins.
Correct Answer: A) Artery.
Correct Answer: A) Pulmonary artery only.
Correct Answer: A) Arteries.
Correct Answer: A) Lymph.
Correct Answer: B) Heart, blood, arteries, and veins.
Correct Answer: C) Arteries.
Correct Answer: B) Tennis.
Correct Answer: D) All of the above.
Correct Answer: A) Congestive Heart Failure.
Correct Answer: D) Hemoglobin.
Correct Answer: B) Carbon dioxide.
Correct Answer: A) Some is oxygen, some doesn't.
Correct Answer: D) Left ventricle.