Explain the role of the digestive system, the respiratory system and the urinary system in the removal of waste. how do these waste products relate to the 3 core resources?

The function of the digestive system is digestion and absorption. Digestion is the breakdown of food into small molecules, which are then absorbed into the body. The digestive system is divided into two major parts: The digestive tract (alimentary canal) is a continuous tube with two openings: the mouth and the anus.