الصف الثالث الابتدائى DISCOVER حل كتاب المدرسة ديسكفر للصف الثالث الابتدائى ترم اول ديسكفرى ثالثه ابتدائى شرح كتاب ديسكفر ثالثه ابتدائى شرح الدرس 5 Discover ديسكفر للصف الثالث الابتدائى ترم اول CHAPTER 2 MAKING A HEALTHY BODY Read the text.WHAT HAPPENS TO THE FOOD YOU EAT? A train, plane, and car all need fuel to run. The fuel provides energy. Our bodies also need fuel for energy, but we do not use the same kind as trains or cars. Luckily, the human body runs on a variety of delicious fuels. We get energy from the food we eat. Food contains thousands of diff erent nutrients. Nutrients provide some of the energy that the human body needs. The body has a process that changes the food we eat into simpler parts. Once food is broken down, the body absorbs it to get energyDigestion begins when you put food in your mouth. Chewing breaks up food into smaller pieces. This makes it easier for saliva in your mouth to soften the food and begin the breakdown. After you swallow, muscles push the food down to your stomach.Inside your stomach, muscles churn acid to further break down the food. Digested food leaves the stomach. The nutrients are carried away in the blood, giving all parts of the human body energy to run. Read the instructions. Follow the steps to make a model stomach. Draw what you observe.HOW THE STOMACH WORKS