Formed elements of blood include -

Options

A. RBC, WBC and blood platelets
B. Proteins present in blood
C. All solutes present in blood
D. All minerals (elements)

Answer

### Step-by-Step Solution:

1. **Understanding Blood Composition**: Blood is composed of two main components: plasma and formed elements. Plasma constitutes about 55% of blood, while formed elements make up approximately 45%.

2. **Identifying Formed Elements**: The formed elements of blood include three primary types of cells:
- **Red Blood Cells (RBCs)**: Also known as erythrocytes, these cells are responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide from the body back to the lungs.
- **White Blood Cells (WBCs)**: Also known as leukocytes, these cells are part of the immune system and help the body fight infections and other diseases.
- **Platelets**: Also known as thrombocytes, these are cell fragments that play a crucial role in blood clotting and wound healing.

3. **Evaluating Answer Options**:
- The question asks for the formed elements of blood. The correct answer must include RBCs, WBCs, and platelets.
- Other options that mention proteins or minerals are incorrect, as these are components of plasma, not formed elements.

4. **Conclusion**: The correct answer to the question about the formed elements of blood is the option that lists RBCs, WBCs, and platelets.

### Final Answer:
The formed elements of blood include Red Blood Cells (RBCs), White Blood Cells (WBCs), and Platelets.

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