Red pulp of spleen is red in colour. It is due to

Options

A. Presence of RBC(s)
B. Network of blood capillaries
C. Presence of haemoglobin
D. All of above

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Spleen**: The spleen has two main components: red pulp and white pulp. The red pulp is primarily involved in filtering blood and is rich in blood cells.

2. **Identifying the Composition of Red Pulp**: The red pulp consists of a network of connective tissue known as the cords of Billroth. This structure is crucial for the function of the red pulp.

3. **Role of Venous Sinuses**: The red pulp contains venous sinuses, which are spaces that store blood. These sinuses are filled with blood, particularly red blood cells (RBCs).

4. **Presence of Red Blood Cells**: The red color of the red pulp is primarily due to the high concentration of red blood cells present in these venous sinuses.

5. **Conclusion**: Therefore, the red pulp of the spleen appears red mainly because of the presence of red blood cells.

6. **Final Answer**: The correct answer to the question is the presence of RBCs (Option 1).

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