Phlebotomy Technician Practice Exam (NCPT/CPT)

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What does the heart pump?

Oxygen
Nutrients
Blood
Water

The correct answer is: Blood

The heart is the main organ responsible for pumping blood throughout the body. Blood carries vital components such as oxygen and nutrients, so options A and B are incorrect as they are components within blood, not something that the heart directly pumps. Option D, water, is not a component of blood and therefore, is also incorrect.