Which of the following is the most abundant of all the cells found in the blood of humans ?

Options

A. Thrombocytes
B. Erythrocytes
C. Platelets
D. Leucocytes

Answer

To solve the question "Which of the following is the most abundant of all the cells found in the blood of humans?", we can follow these steps:

### Step 1: Identify the Options
We have four options to consider:
1. Thrombocyte
2. Erythrocyte
3. Platelets
4. Leukocyte

### Step 2: Understand Each Option
- **Thrombocytes**: These are involved in blood clotting. They are not the most abundant cells in the blood.

- **Erythrocytes**: These are red blood cells (RBCs) that contain hemoglobin, which is essential for transporting oxygen throughout the body. They are known to be the most abundant cells in human blood.

- **Platelets**: Often referred to as thrombocytes, they play a role in clotting but are not as numerous as erythrocytes.

- **Leukocytes**: These are white blood cells (WBCs) that are part of the immune system and help fight against infections. They are less abundant than erythrocytes.

### Step 3: Compare the Abundance
From the definitions and functions:
- Erythrocytes (RBCs) are the most numerous, with approximately 4.5 to 6 million cells per microliter of blood.
- Thrombocytes (platelets) and leukocytes (WBCs) are present in much lower quantities, with platelets around 150,000 to 450,000 per microliter and leukocytes around 4,000 to 11,000 per microliter.

### Step 4: Conclusion
Based on the information analyzed, the most abundant cells in human blood are **erythrocytes**.

### Final Answer
The correct answer is **Erythrocyte (Option B)**.

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