The given diagram shows different types of blood vessels involved in the blood circulation in the human body.The blood vessel with the LOWEST rate of blood flow is:
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
Each capillary is extremely narrow, there are millions of them, and this wide distribution forces the blood to spread out, slowing it down.Blood flow rate is lowest in capillariesso option D is correct.
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About Blood Vessels
Blood vessels include arteries, arterioles, capillaries, venules and veins, whose wall thickness, elasticity, lumen size and valves suit their roles in circulation. Questions compare pressure and blood flow in each vessel and distinguish pulmonary vessels, which carry blood to and from the lungs, from systemic vessels.
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