The diaphragm is the portion of the respiratory system composed of a dome-shaped muscle that runs across the upper abdomen and is attached to the bottom of lungs.
a. True
b. False

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Grade: Education Subject: health
The diaphragm is the portion of the respiratory system composed of a dome-shaped muscle that runs across the upper abdomen and is attached to the bottom of lungs.
a. True
b. False
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The answer is true. We do have a dome shaped muscle that runs across our upper abdomen.