When there is a sudden loss of blood from the body the organ which supplies blood is :

Options

A. Spleen
B. Heart
C. liver
D. Lung

Answer

To solve the question "When there is a sudden loss of blood from the body, the organ which supplies blood is:", we will analyze the options provided and determine which organ plays a crucial role in supplying blood during such a situation.

### Step-by-Step Solution:

1. **Understanding Blood Loss**: When there is a sudden loss of blood, the body needs to compensate for this loss to maintain adequate circulation and supply oxygen to tissues.

2. **Evaluating the Options**:
- **Option 1: Spleen**: The spleen acts as a reservoir for blood and can release stored blood into circulation when needed. It also plays a role in filtering blood and removing old or damaged red blood cells. Therefore, it can be considered as an organ that helps supply blood during blood loss.

- **Option 2: Heart**: The heart is responsible for pumping blood throughout the body. However, it does not supply blood in the sense of storing or releasing it during blood loss. Its primary function is circulation, not supply.

- **Option 3: Liver**: The liver plays a vital role in detoxifying substances and metabolizing nutrients, but it does not directly supply blood during a sudden loss. Its functions are more related to processing blood rather than supplying it.

- **Option 4: Lungs**: The lungs are primarily involved in gas exchange (oxygen and carbon dioxide) and do not supply blood. They are not involved in blood volume regulation.

3. **Conclusion**: Based on the analysis of the options, the spleen is the organ that can supply blood during a sudden loss because it can release stored blood into circulation.

### Final Answer:
The organ which supplies blood when there is a sudden loss of blood from the body is the **spleen**.

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