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What is the approximate composition of the earth's atmosphere?
Strontium
A chemical element with symbol Sr, known for its role in bone health and as a tracer in geological studies.
Trillion Cells
The approximate number of cells that make up the human body, comprising various types essential for overall function and health.
Billion Cells
A reference to a quantity, indicating an organism or structure composed of approximately one billion cells.
Human Body
The physical structure of a person, comprising various biological systems that ensure survival and reproduction.
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