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Answer: An open system can exchange both matter and energy with the surroundings. Î´ H is measured when an open system is used as a calorimeter. A closed system has a fixed amount of matter, but it can exchange energy with the surroundings.
An open circulatory system describes a system where blood and interstitial fluid are allowed to mix in an organism. Interstitial fluid is just the fluid found between cells in the body.nother interesting aspect about organisms that utilize an open circulatory system is they can't create a blood pressure. In mammals, our blood pressure is due to the pumping of our heart. Remember, our blood is separated from our interstitial fluid.