The activity that helps build the most muscular endurance is rowing
So you wont pull a little muscle in it
The answer is: [D]: "os" .
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The opening for the "cervical canal" is called the:
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→ "cervical os" .
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Note that: "os" — means "mouth" in Latin; which is similar to "opening' .
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C. They count steps during a workout, is the correct answer