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When a meteoroid enters the Earth's upper atmosphere, it heats up due to friction from the air. The heat causes gases around the meteoroid to glow brightly.
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Social-psychology; physical.
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Answer:
efends the body from microorganisms that could cause it harm or even death. one of the additional functions of the immune system. helps maintain homeostasis by removing old and or damaged cells from the body. complex and broad range of defensive mechanisms that the human body uses to combat infections and diseases.
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