HEART online puzzle

What system do I belong to? The heart is the main organ of the circulatory system. A close up of a toy. It is an elastic "jacket" that is shaped like the letter "J". It performs three important functions: storing the food you have eaten. break food down into a liquid mixture. A close up of a toy. Pump blood to all corners of the body. Blood collects oxygen as it passes through the lungs and circulates to the heart to be propelled to all parts of the body. A close up of a toy. What system do I belong to?

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