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The blood in the cardiovascular system carries gases, hormones, nutrients, and wastes. Oxygen, nutrients, and certain hormones are carried to the cells; and carbon dioxide, wastes, and certain hormones are carried away from the cells. Hormones are not nutrients or wastes. They are chemical messengers that are secreted by certain cells and carried to other parts of the body where they will have an effect, which depends on the hormone.

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13y ago

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