Haemoglobin and leghaemoglobin

Explanation

**Step-by-Step Solution:**

1. **Definition of Hemoglobin:**
Hemoglobin is a red pigment found in red blood cells (RBCs) of animals, including humans. It is responsible for the red color of these cells.

**Hint:** Remember that hemoglobin is primarily associated with the transport of oxygen in the bloodstream.

2. **Function of Hemoglobin:**
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