Fill in each blank with the best choice from the words in brackets
Arteries have no valves. Nevertheless, veins do have valves, which prevent backflowof blood. The colour of blood provides yet another way in which arteries and veins are not ________________ (alike/same).

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Solution

alike.

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Complete the following statements by filling in the blanks from the choices given in the bracket.
(a) The blood vessel that begins and ends in capillaries is the ... (hepatic artery. Hepatic portal vein, hepatic vein)
(b) A blood vessel which has a small lumen and thick walls is (capillary, lymphatic duct, artery, venule)
(c) the valve which prevents backflow of blood in the veins and lymph vessels... (mitral valve, tricuspid valve, semilunar valve).

Veins have valves to prevent the backflow of blood because the blood in veins flow ________.

Q. Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?

Q. Assertion: Valves are present in veins.
Reason: Valves prevent the backflow of blood in veins.

Under which condition, the valves in the vein prevents backflow of blood?

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Fill in each blank with the best choice from the words in bracketsArteries have no valves. Nevertheless, veins do have valves, which prevent backflowof blood. The colour of blood provides yet another way in which arteries and veins are not ________________ (alike/same).

alike.

Fill in each blank with the best choice from the words in brackets
Arteries have no valves. Nevertheless, veins do have valves, which prevent backflowof blood. The colour of blood provides yet another way in which arteries and veins are not ________________ (alike/same).