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Circulatory system App MCQs Download & e-Book - 360

MCQ:

Veins do not require thick walls

  1. as they do not have to work harder
  2. they are required only occasionally
  3. the blood pressure declines while it gets to veins
  4. the blood pressures is immense

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Circulatory system App (Android & iOS)

Circulatory system App (Android & iOS)

O Level Biology App (Android & iOS)

O Level Biology App (iOS & Android)

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College Biology App (Android & iOS)

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Zoology App (iOS & Android)