I believe the acidic bile breaks down organic matter in the stomach.
The rotation of the Earth in its axis
- Biology Definition: Respiration is a chemical reaction that happens in all living cells. (Both plant cells and animal cells). Respiration is the way that energy is released from glucose so that all the other chemical processes needed for life can happen.
- Normal definition: The action of breathing, also called ventilation.
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The scientific methods is limited to investigation physical phenomena that are observable, repeatable, falsifiable and measurable.