Blood vessels are______________?
Correct answer: B. Not rigid
- A. Rigid
- B. Not rigid
- C. Of glass
- D. Of rubber
Explanation
Blood vessels are elastic and deformable rather than rigid, allowing their diameter to change with blood pressure and flow. The likely mistake is choosing rubber, because vessels have elastic behaviour, but they are biological tissues, not rubber tubes.
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About Fluid Flow
Fluid flow covers pressure, density, viscosity and the motion of liquids and gases through pipes or open channels. It includes the continuity equation, Bernoulli equation, streamline and turbulent flow, and the effects of changing area, height and speed. Viscosity and ideal fluid assumptions must not be confused with pressure effects.
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