what is the main focus/ function of the following: circulatory system digestive system excretory system urinary system respiratory system and skeletal system

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The circulatory system brings oxygen into your blood. The digestive system is for digesting your food to collect nutrients. The excretory system is for removing wastes from your body. The urinary system is to remove urine from your body which is part of the excretory system. The respiratory systems lets oxygen into your body and eliminates carbon dioxide. The skeletal system is for protecting the organs in your body and to give you shape and support.

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