Bleeding is stopped by the application of ferric chloride. This is because

Options

A. The blood starts flowing in opposite direction.
B. The blood reacts and forms a solid, which seals the blood vessel.
C. The blood is coagulated and thus the blood vessel is sealed.
D. The ferric chloride scals the blood vessel.

Answer

To understand why bleeding is stopped by the application of ferric chloride (FeCl3), we can break down the explanation into a step-by-step solution:

### Step-by-Step Solution:

1. **Understanding Blood Composition**: Blood is composed of various components, including red blood cells, white blood cells, platelets, and plasma. The blood has negatively charged particles, particularly proteins and cells.

2. **Role of Ferric Chloride**: Ferric chloride (FeCl3) contains ferric ions (Fe³⁺), which are positively charged. When FeCl3 is applied to a bleeding wound, it dissociates to release these Fe³⁺ ions.

3. **Neutralization of Charges**: The negatively charged particles in the blood can destabilize the blood's colloidal nature. The positively charged Fe³⁺ ions from ferric chloride neutralize the negative charges on the blood components.

4. **Coagulation Process**: When the negative charges are neutralized, the blood components aggregate or clump together, leading to coagulation (clotting). This process forms a gel-like structure that helps to seal the wound.

5. **Sealing the Blood Vessel**: The coagulated blood forms a barrier that effectively seals the blood vessel, stopping the flow of blood. This is crucial in preventing excessive blood loss.

6. **Conclusion**: Therefore, the application of ferric chloride stops bleeding by coagulating the blood, which seals the blood vessel.

### Final Answer:
Bleeding is stopped by the application of ferric chloride because it coagulates the blood, leading to the sealing of the blood vessel.

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