Why do we need the Digestive System? We need the digestive system to break down complex foods. It helps you get nutrients into your body our body uses nutrients to help with growth, energy and cell repairs. Foods and drinks must be broken down into smaller crumbs before the blood absorbs them to travel around the body. How it works is that once we eat food it goes through the esophagus into the stomach and then goes to the small intestine. This is why we need the digestive system. Affecting diseases to the Digestive System One of the major diseases to the digestive system is Crohn disease. It makes the tissue in your body swell up it can also lead to tiredness, weight loss and severe diarrhea. Some systems for it are mouth sore pains, fever, diarrhea and tiredness. Ways to keep your body safe from Crohn disease is to avoid a lot of dairy products and greasy foods and especially fried dishes. This is why you should be careful about the foods you eat. How to keep our digestive system healthy Ways to keep our digestive system. Make sure to keep sure of what foods your eating. Make sure you eat highfibre foods like beans. Lentils. Avocado and apples. Drink lots of water. Try to eat lots of lean foods. Add probiotics to your daily meals. Try to eat foods you usually eat like not adding different foods every day to your diet. Don't eat so fast because it is not good for your stomach. These are a few ways to keep our digestive system healthy.