PDHPE Preliminary Practice Exam 2025 - Free PDHPE Practice Questions and Study Guide

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What is the main function of the cardiovascular system?

To digest food

To transport oxygen and nutrients to cells

The main function of the cardiovascular system is to transport oxygen and nutrients to the cells. This system comprises the heart, blood vessels, and blood, which work together to circulate these essential substances throughout the body. Oxygen is vital for cellular respiration, the process by which cells produce energy, while nutrients are necessary for growth, repair, and overall functioning of the body.

As the heart pumps blood, it carries oxygen from the lungs and nutrients from the digestive tract to all the tissues and organs. This circulation is crucial for maintaining homeostasis, supporting metabolic processes, and ensuring that cells have the resources they need to thrive. The efficiency of the cardiovascular system directly impacts overall health and physical performance, as inadequate oxygen or nutrient delivery can lead to fatigue and impaired function in various bodily systems.

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To provide a framework for the body

To coordinate body movements

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