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Type: True or False
Category: Circulatory and Immune Systems
Level: Grade 8
Score: 4
Author: Gary_Lanham
Last Modified: 4 months ago

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Circulatory and Immune Systems Question

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Grade 8 Circulatory and Immune Systems

The heart contracts on its own about 200,000 times a day.
  1. True
  2. False
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