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Home Q & A Board Biology-Related Homework Help General Biology
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RedManchester23 RedManchester23
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6 years ago
Which of the following assist(s) in venous return to
  the heart?
  a. valves that prevent backflow
  b. vasoconstriction during exercise
  c. contraction of skeletal muscles alongside veins
  d. pressure changes in the thorax during breathing
  e. all of these

Question 2

The greatest volume of blood is found in the
  a. aorta and arteries.
  b. capillaries.
  c. veins.
  d. lungs.
  e. heart.
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lorrkelly1lorrkelly1
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6 years ago
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#2
4 years ago
thank you
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#3
3 years ago
Thankyou
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