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Respiration and Circulation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYRespiration and Circulation2 Marks
Question
Give reasons : Valves are present in veins.
✓

Answer

  1. Veins carry blood to the heart.
  2. At that time the backward flow of the blood should be prevented.
  3. Therefore, valves are present in veins.

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