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book The Living World 8th Edition by George Johnson cover

The Living World 8th Edition by George Johnson

النسخة 8الرقم المعياري الدولي: 978-0078024214
book The Living World 8th Edition by George Johnson cover

The Living World 8th Edition by George Johnson

النسخة 8الرقم المعياري الدولي: 978-0078024214
تمرين 7
The diameter of veins is typically larger than that of arteries, because
A) veins must carry blood at a higher pressure than arteries.
B) veins carry more blood than arteries do.
C) veins have fewer muscles to constrain their diameter.
D) larger diameter vessels have reduced resistance to flow.
At any one time, how can the fraction of your blood present in your veins be greater than that in your arteries?
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The group of worms known as annelids and...

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The Living World 8th Edition by George Johnson
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