The stage of the heart cycle in which the heart muscle is relaxed<span>, allowing the chambers to fill with blood. ... The </span>stage of the heart cycle in which the heart muscle<span> contracts and the chambers pump blood. Systolic Pressure. Blood pressure in the arteries during contraction of the ventricles</span>
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On average, the Moon is about 150 million kilometres (or 93 million miles) from the Sun
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i believe primary
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because its from one's own experiences
An eye is a body part that can be spelled forwards and backwards :)