The circulatory system

The circulatory system is the set of organs responsible for distributing nutrients to cells and collecting their metabolic excreta to be eliminated by excretory organs. The organs that are part of the circulatory system are: heart, blood vessels, blood, lymph and lymphatic vessels. It is responsible for conducting essential elements to all body tissues: oxygen to cells, hormones (which are released by endocrine glands) to tissues, conducting carbon dioxide for elimination in the lungs, collecting metabolic and cellular excreta, delivery of these wastes to excretory organs such as the kidneys.
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