Iron-containing protein in red blood cells.

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Iron-containing protein in red blood cells.

Haemoglobin is the iron-containing protein in red blood cells. It has iron in its heme groups that reversibly binds oxygen, allowing red blood cells to pick up oxygen in the lungs and release it to tissues throughout the body. Myoglobin also has iron but sits in muscle tissue, where it stores and releases oxygen for muscle cells rather than transporting it in the blood. Fibrinogen is a clotting protein produced by the liver and does not contain heme. Albumin is the main plasma protein that helps maintain osmotic pressure and transport substances, but it does not contain iron in its structure.

Haemoglobin is the iron-containing protein in red blood cells. It has iron in its heme groups that reversibly binds oxygen, allowing red blood cells to pick up oxygen in the lungs and release it to tissues throughout the body.

Myoglobin also has iron but sits in muscle tissue, where it stores and releases oxygen for muscle cells rather than transporting it in the blood. Fibrinogen is a clotting protein produced by the liver and does not contain heme. Albumin is the main plasma protein that helps maintain osmotic pressure and transport substances, but it does not contain iron in its structure.

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