What are the functions of red blood cells , white blood cells and nuclei ?

What are the functions of red blood cells , white blood cells and nuclei ?
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The function of red blood cells: Red blood cells carry oxygen from the lungs to the cells through hemoglobin. Red blood cells are the most important blood cells or cells that provide oxygen to the tissues of the vertebrate body. During circulation in the capillaries of the lungs or gallbladder, oxygen is collected in the red blood cells from the airways and carbon dioxide is released. In other tissues, oxygen is transferred from the red blood cells to the blood cells during blood flow through the capillaries and carbon dioxide flows in the opposite to the red blood cells. The function of white blood cells: White blood cells surround the germs that enter the bloodstream and protect the body by destroying the germs in the process of phagocytosis. The function of the nucleus accumbens: When any part of the body is cut, the nucleus accumbens binds blood to that place. As a result, bleeding from the wound stops.
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