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PHE › ViewSwimming can be done in any 9f the following except
A. Rivers
B. Swimming pool
C. Pond
D. Puddles
The Vascular System and Blood Flow › View
What is the main role of the nervous system in the return of blood to the heart?
A. Assisting in the distribution of blood to different organs
B. Pushing or massaging blood back to the heart with each muscle contraction
C. Causing veins to slightly constrict to return more blood to the heart
D. Creating a difference in pressure between the veins in the chest and abdominal cavities