The cell that transports oxygen in the blood is the red blood cell, also known as an erythrocyte.

Here's why:

* Hemoglobin: Red blood cells contain a protein called hemoglobin. Hemoglobin has a strong affinity for oxygen, meaning it readily binds to oxygen molecules in the lungs.

* Transportation: Once oxygen is bound to hemoglobin, the red blood cell travels through the circulatory system, delivering oxygen to tissues throughout the body.

* Efficiency: Red blood cells are specialized for oxygen transport. They lack a nucleus and most other organelles, maximizing space for hemoglobin. Their biconcave shape increases surface area for oxygen exchange.

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