Which one of the following organ can be called a sort of ''blood bank''

Options

A. Heart
B. Liver
C. Spleen
D. Lungs

Answer

To determine which organ can be referred to as a "blood bank," we will analyze the functions of the given options one by one.

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options: Heart, Liver, Spleen, and Lungs.

2. **Evaluate the Heart**:
- The heart's primary function is to pump blood throughout the body. It is responsible for circulating oxygen and nutrients to tissues.
- **Conclusion**: The heart cannot be considered a blood bank.

3. **Evaluate the Liver**:
- The liver has multiple functions, including detoxifying metabolites, synthesizing proteins, and producing biochemicals necessary for digestion and growth.
- **Conclusion**: The liver does not serve as a blood bank.

4. **Evaluate the Spleen**:
- The spleen plays a crucial role in blood purification and is involved in the storage of blood cells. It filters blood and helps in the removal of old or damaged blood cells.
- **Conclusion**: The spleen is often referred to as a "blood bank" due to its ability to store and purify blood.

5. **Evaluate the Lungs**:
- The lungs are primarily involved in respiration, facilitating the exchange of oxygen and carbon dioxide.
- **Conclusion**: The lungs do not function as a blood bank.

6. **Final Answer**: Based on the evaluations, the organ that can be called a "blood bank" is the **Spleen**.