Biology STAAR (State of Texas Assessments of Academic Readiness) Practice Test

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Prepare for the Biology STAAR Exam with our interactive test. Utilize flashcards and multiple-choice questions with detailed explanations and hints. Ace your exam confidently!

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What is the function of the circulatory system?

To break down food for digestion
To deliver oxygen and nutrients to cells and remove waste
To protect the body from disease
To conserve body heat and regulate temperature

The correct answer is: To deliver oxygen and nutrients to cells and remove waste

The function of the circulatory system is to deliver oxygen and nutrients to cells throughout the body and remove waste products, such as carbon dioxide and metabolic byproducts. This system includes the heart, blood vessels, and blood, which work together to ensure that essential substances reach the cells that need them for energy, growth, and maintenance. Oxygen, obtained from the lungs, is transported via the bloodstream to all body tissues, while nutrients from digested food are also circulated in the blood. Moreover, the circulatory system plays a crucial role in maintaining homeostasis by removing waste products from cellular metabolism, preventing their buildup, which could be harmful to the body. By efficiently managing these processes, the circulatory system supports overall health and functioning of all tissues and organs.