What is an average life span of erythrocytes?

Explanation

**Step-by-Step Solution:**

1. **Define Erythrocytes**: Erythrocytes, commonly known as red blood cells (RBCs), are cells in the blood that are responsible for transporting oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs.

2. **Location of Production**: Erythrocytes are produced in the bone marrow, which is the spongy tissue found in the center of bones.

3. **Function of Erythrocytes**: The primary function of erythrocytes is to carry gases—specifically, they transport oxygen to the tissues and help in the removal of carbon dioxide.

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