The lymphatic system drains excess fluid from tissues and filters out pathogens — it has no pump and moves via muscle contraction.
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The Earth is slightly flattened at the poles.
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The Dead Sea is one of the saltiest bodies of water on Earth.
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The human brain contains about 86 billion neurons.
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The gulper eel has a large mouth that allows it to swallow prey bigger than its body.
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Atmospheric rivers can deliver massive amounts of rainfall.
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The human skeleton renews itself over time.
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The human body has over 600 muscles.
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