The cells made in the bone marrow that transport oxygen throughout the body are red blood cells, also known as erythrocytes.

Here's why:

* Bone Marrow Production: Red blood cells are produced in the bone marrow, specifically in a process called erythropoiesis.

* Oxygen Transport: They contain a protein called hemoglobin, which binds to oxygen in the lungs and carries it to all the tissues and organs in the body.

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