Just click the flag and watch!
to: The school because this is for school. And to: 1: https://www.scientificamerican.com/article/gut-feelings-the-second-brain-in-our-gastrointestinal-systems-excerpt/ 2: http://kidshealth.org/en/kids/digestive-system.html 3: http://www.innerbody.com/image/digeov.html 4: http://www.biology4kids.com/files/systems_digestive.html 5: https://www.livescience.com/40187-digestive-system-surprising-facts.html
