Nurse Aide Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 515

What primary function does the heart serve in the body?

Pumps oxygen and nutrients to cells

The primary function of the heart is to pump oxygen-rich blood throughout the body, delivering essential nutrients and oxygen to cells while also facilitating the removal of waste products like carbon dioxide. This action is vital for sustaining life, as every cell in the body requires a constant supply of oxygen to perform its functions effectively.

In circulation, the heart works in tandem with the lungs, where oxygen is absorbed into the blood and carbon dioxide is expelled. The heart’s contractions create pressure that propels the blood through a complex network of arteries and veins, ensuring that all tissues receive adequate oxygen and nutrients necessary for energy production and overall health. This role of the heart as a pump is fundamental to the circulatory system, making it a critical organ for sustaining bodily functions and overall homeostasis.

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Filters waste from the bloodstream

Produces hormones that regulate bodily functions

Maintains body temperature and fluid balance

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