The blood vessels in which there are no valves includes
(a) veins and capillaries (b) capillaries and arteries
(c) arteries and nerves (d) veins and arteries

Dear student,

Veins carry blood towards the heart, to prevent backflow of blood valves are present in the vein while in arteries no valve is present because sufficient amount of pressure is applied by the heart to pump blood. Capillaries form connection between arteries and veins. No valves are present in the capillaries. So, arteries and capillaries don't have valve. So correct option is (b) capillaries and arteries.

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