Who performs the task of capturing oxygen in the blood?

Haemoglobin

The correct answer is Option (4) - Haemoglobin

The task of capturing oxygen in the blood is performed by: Haemoglobin

Haemoglobin is a protein found in red blood cells that binds to oxygen in the lungs and carries it to tissues throughout the body. In the lungs, oxygen molecules attach to the iron atoms in haemoglobin, forming oxyhaemoglobin. This oxygenated haemoglobin is then transported via the bloodstream to cells and tissues, where it releases oxygen for cellular respiration. Haemoglobin also plays a crucial role in transporting carbon dioxide, a waste product of cellular metabolism, from the tissues back to the lungs for exhalation. This process ensures efficient gas exchange and oxygen delivery.