What is the main function of the circulatory system?, To transport substances around the body., breath, 2. How many chambers does the heart have?, two chambers, Four chambers, 3. What is the difference between arteries and veins?, Arteries carry blood away from the heart; veins carry blood toward the heart., same, 4. What does blood transport around the body?, Oxygen, nutrients, hormones, and waste products., water

circulatory system

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