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- Severe blood loss can trigger a positive feedback system.
- Normally, the heart pumps blood to supply oxygen and nutrients.
- Blood loss causes a drop in blood pressure.
- Lower blood pressure reduces oxygen delivery to cells.
- Heart cells receive less oxygen and function poorly.
- The heart’s pumping ability becomes weaker.
- Weaker pumping causes blood pressure to fall even more.
- This creates a cycle of worsening decline.
- The cycle can lead to death without medical intervention.
- Blood clotting is another example of positive feedback.
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