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All living things are made up of Cells
A group of Cells e.g. Heart Muscle makes up a Tissue e.g. Heart Muscle Tissue
A group of Tissues makes up an Organ e.g. Heart
A group of Organs makes up a System e.g. Circulatory System
A group of Systems make up…

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The heart is a four-chambered muscular pump which pumps blood round the circulatory system.
The right side of the heart pumps de-oxygenated blood to the lungs to pick up oxygen.
The left side of the heart pumps the oxygenated blood from the lungs around the rest of the body.




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