Both RBCs and WBCs are formed in

Options

A. Cartilage
B. Thyroid
C. Bone marrow
D. Plasma

Answer

**Step-by-Step Solution:**

1. **Identify the Components of Blood:**
- Blood consists of various components, including red blood cells (RBCs), white blood cells (WBCs), and platelets.

2. **Understand the Functions of RBCs and WBCs:**
- RBCs are responsible for transporting oxygen and carbon dioxide due to the presence of hemoglobin, which gives them their red color.
- WBCs play a crucial role in the immune system, helping the body to fight against infections and foreign antigens.

3. **Determine the Site of Formation:**
- Both RBCs and WBCs are formed in the bone marrow. This is a specialized tissue found within certain bones.

4. **Identify the Stem Cells Involved:**
- The formation of RBCs and WBCs originates from multipotent stem cells known as hematopoietic stem cells, which are located in the bone marrow.

5. **Differentiate Between Other Options:**
- Cartilage is a type of connective tissue found in various parts of the body but is not involved in blood cell formation.
- The thyroid gland produces hormones like thyroxine but does not produce blood cells.
- Plasma is the liquid component of blood that carries cells and nutrients but is not where blood cells are formed.

6. **Conclude the Answer:**
- Therefore, the correct answer to the question is that both RBCs and WBCs are formed in the bone marrow.

**Final Answer:** Both RBCs and WBCs are formed in the bone marrow.

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