Is tax to be paid or an amount of money should be paid.
Google.
Answer:
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
Explanation:
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<h2>Question</h2>
The more physically fit you are
<h2>✒ Answer</h2>
D. the lower your resting heart rate
<h3>Full sentence</h3>
The more physically fit you are the lower your resting heart rate
Cardiovascular fitness !! anything involving the heart / heart exercises are considered cardio !! hope this helps