Answer:
Oxygen
Explanation:
Blood carries oxygen to the cells of the body. Oxygen is transported by hemoglobin, a protein in red blood cells that binds with oxygen in the lungs and releases it to the tissues and cells throughout the body. This process is essential for cellular respiration, where cells use oxygen to generate energy. Additionally, blood also carries other gases such as carbon dioxide, which is produced by cells as a waste product and transported back to the lungs for exhalation.
