How do the digestive and respiratory systems work together for the general health of the body? The digestive system provides oxygen, and the respiratory system provides glucose for the cells. The digestive system provides oxygen, and the respiratory system provides glucose for the cells. The digestive system provides glucose, and the respiratory system provides oxygen for the cells. The digestive system provides glucose, and the respiratory system provides oxygen for the cells. The digestive system provides carbon dioxide, and the respiratory system provides glucose for the cells. The digestive system provides carbon dioxide, and the respiratory system provides glucose for the cells. The digestive system provides glucose, and the respiratory system provides carbon dioxide for the cells.