Science(13/12/16)

Dear Learners,

Revise todays topic.

Working of Heart

Answer the follwing questions in NB1.

Explanation Task: give reasons

  1. White blood cells are called as soldiers of our body.
  2. Arteries have thick and elastic walls.
  3. Veins have valves.

Image result for image of heart in body

Image result for image of heart in body

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