Page 38 - Science E-Book Nada Prim.3 2024-2025 1st term part 1 _Neat
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4-The heart beat and push blood through your body to

               deliver nutrients and oxygen to all body parts.







               5-The heart is divided into 2 sides.







               6-The heart automatically contracts and expand to beat.



               7-The heart expands when it's filled with blood.








               8-The heart contracts when pushing blood.







               9-Laughing is good for your heart.














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