Answer: Please show me your options, so that I can help you with this lesson.
Explanation:
The second trimester is when the respiratory system is mature.
Answer: Use your maximum heart rate.
Explanation:
To set your intensity level, you need to use your maximum heart rate, which is determined by subtracting your age froom 220.
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Differentiation is the process of going from a stem cell to a differentiated, specialized cell.