Respuesta :

Answer:

Two of them are the digestive system and respiratory system.

‘The example is  Because the digestive system breaks down food and uses muscular contractions to move food through the digestive tract, it needs oxygen to function properly.

Explanation:

Answer: for example the respiratory system and the circulatory system work closely together to deliver oxygen to cells and To get rid of the carbon dioxide the cell produce the circulatory system picks up oxygen in the lungs and drops it off in the tissues then perform is the reverse service for carbon dioxide
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