Hemoglobin is a protein found in red blood cells that plays a key role in transporting oxygen and carbon dioxide in the body. Here's its role in brief:

1. Oxygen Transport: Hemoglobin binds with oxygen in the lungs and carries it through the bloodstream to tissues and organs.

2. Carbon Dioxide Removal: It also picks up carbon dioxide (a waste product) from tissues and transports it back to the lungs for exhalation.

3. Color: Hemoglobin gives red blood cells their color, as it contains iron that binds oxygen and gives a red hue when oxygenated.

In short, hemoglobin ensures oxygen reaches all body parts and helps remove carbon dioxide, maintaining overall respiratory balance.

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Role of Haemoglobin Pigments in Our Blood

Haemoglobin is a complex iron-containing protein found in red blood cells and is responsible for the red color of blood. It plays a central role in the transport of respiratory gases mainly oxygen and carbon dioxide which is essential for sustaining life.

Oxygen transport

One of the most important functions of haemoglobin is to carry oxygen from the lungs to the tissues of the body in the lungs where oxygen concentration is high haemoglobin binds with oxygen to form a compound called oxyhaemoglobin. This binding occurs at the iron (Fe²plus) ion present in the heme group of the haemoglobin molecule.

As blood flows to different parts of the body the oxygen concentration decreases and haemoglobin releases the oxygen into the tissues where it is used for cellular respiration the process that produces energy (ATP) in cells.

Carbon dioxide transport

Haemoglobin also assists in the transport of carbon dioxide, a waste product of cellular respiration. While most carbon dioxide is transported in the plasma as bicarbonate ions, a significant portion about 20–25percent binds directly to haemoglobin forming carbaminohaemoglobin. This carbon dioxide is then carried back to the lungs where it is released and expelled from the body during exhalation.

Buffering action maintaining pH balance

Haemoglobin also acts as a buffer helping to maintain the pH balance of blood. When it binds with hydrogen ions (H plus) it helps regulate the blood's acidity keeping the internal environment stable a condition known as homeostasis.

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Haemoglobin is a red pigment found in our blood that helps transport oxygen.  It is located in red blood cells.  When we breathe in, haemoglobin transports oxygen from the lungs to the rest of the body.  Then it returns carbon dioxide (a waste gas) from the body to the lungs, allowing us to breathe it out.

So, haemoglobin helps us get oxygen and eliminate waste gases, keeping us alive and healthy.