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gregory12
Organ systems of the human body interact to maintain a balanced internal environment. As blood flows through certain organs of the body, the composition of the blood changes because of interactions with those organs. The composition of blood is basically whats in the blood. The blood changes composition constantly when oxygen is being released into cells and carbon dioxide is being eliminated from the cells into the blood. i'm not sure about the digestive system. maybe the molecules get broken down? 

Answer:

Respiratory system includes respiratory passage and respiratory organ i.e lungs.

Explanation:

The transport of gases occurs via blood medium. The deoxygenated blood is transported from heart to the lungs for exchange or oxygenation. As the blood flows through the respiratory system the carbon dioxide is exchanged with oxygen. The oxygenated blood is then transported to heart for further circulation to various body parts.  Some amount of gases get dissolved in the blood plasma and transported, whereas some amount is transported in the bound state. Oxygen and CO2 bind with hemoglobin in RBC.

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