Which pigment in red blood cells is responsible for transporting oxygen as oxyhaemoglobin?

Haemoglobin is the pigment in red blood cells that is specifically designed to transport oxygen. It contains iron, which allows it to bind with oxygen molecules in the lungs, forming oxyhaemoglobin. This process is crucial for transporting oxygen from the lungs to the tissues throughout the body, where it is needed for cellular respiration and energy production.

Myoglobin, while also involved in oxygen transport, is primarily found in muscle tissues and serves a different function. It stores oxygen for use during muscle contraction rather than transporting it from the lungs to other parts of the body.

Chlorophyll is the green pigment found in plants that plays a key role in photosynthesis, allowing plants to absorb light energy. It is not involved in oxygen transport in animals.

Carotene is a pigment that contributes to the orange and yellow colors in many fruits and vegetables and acts as a precursor to vitamin A, but it has no role in the transport of oxygen in the bloodstream.