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the blood cells
Red blood cells and white blood cells belong to the circulatory system. White cells are also found in the lymphatic system and are important in the immune response. Red blood cells are also found in the spleen. The spleen breaks down old red blood cells and recycles them and acts as a reservoir for red blood cells when excess bleeding occurs.
The heart, blood vessels, and blood cells are parts of the cardiovascular system.
The immune system uses white blood cells but they are produced and are part of the circulatory system.
The Musculo-Skeletal System creates red blood cells! Red blood cells are created in the bone marrow. Red blood cells deliver oxygen to all cells of the body. :)
Blood carries nutrients to the body's cells.
nervous system
White blood cells are part of the immune system's defense. White blood cells flock to irritations and infections to heal or eliminate them.
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Frog Red Blood Cells and Human Red Blood Cells
White blood cells Hope it helped!
health cells to the nephorns