Which best describes how the small intestine works with a body system to meet the needs of the cells? (a. the small intestine works with the respiratory system get oxygen to the cells and remove carbon dioxide, a waste product.) (b. the small intestine works with the digestive system to continue to breakdown the food so it can be absorbed and sent to the cells for nutrients.) (c. the small intestine works with the excretory system to produce urine that is then released from the body and waste from the cells is removed.) (d. the small intestine works with nervous system to send signals from your brain cells to the neurons, allowing your brain to tell them what to do.)