Name the central atom present in haemoglobin and chlorophyll.

Explanation

To answer the question regarding the central atom present in hemoglobin and chlorophyll, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Hemoglobin:**
- Hemoglobin is a protein found in red blood cells that is responsible for transporting oxygen throughout the body.

2. **Determine the Central Atom in Hemoglobin:**
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