The circulatory system
The circulatory system, the heart and blood vessels, doesn't work alone: it picks up oxygen the respiratory system brought in and nutrients the digestive system broke down, then pumps that combination through blood vessels to every cell in the body, and carries away waste for the excretory system to remove.
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Midterm
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This final covers a lot of topics, so it's split into 2 parts. Each part includes a question from every one of its topics.
Final, Part 1 of 2
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Final, Part 2 of 2
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