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-(1) Velocity of blood flow when cross-sectional area increases
(2) Velocity of blood flow when cross-sectional area decrease
A)The first item is greater than the second item.
B)The first item is less than the second item.
C)The first item is equal or nearly equal to the second item.

Question

Quizplus · Accepted Answer

According to the principle of continuity, which is derived from the conservation of mass, the velocity of a fluid (in this case, blood) decreases as the cross-sectional area of the vessel through which it is flowing increases, and conversely, the velocity increases as the cross-sectional area decreases. This means that when the cross-sectional area increases, the velocity of blood flow is less than when the cross-sectional area decreases.

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