The digestive system how it works Hệ tiêu hóa The digestive system is made up of the gastrointestinal tract—also called the GI tract or digestive tract—and the liver, pancreas, and gallbladder. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.
The Digestive System: How it Works The digestive system is designed to convert the food we eat into nutrients which is used by the body for energy, repairing worn out cells and growth Free PPT’s: www.ecosystemforkids.com The Digestive System: How it Works Mouth Digestive system Food is chewed in the mouth with the Food fromThis thereduces mouthfood to into the help ofmoves the teeth Throat throat pharynx) and further to the smaller (or particles and during the process it esophagus is mixed with saliva Saliva also contains Esophagus The esophagus is aamylase, muscular which tube a digestive enzyme, extending the throat the stomach Stomach works on from breaking downtohollow carbohydrate The stomach is a sac-like organ The lower esophageal sphincter is or a into starch like bread, potatoes, with strongFood muscular walls It holds Small valve right wherecarbohydrates the esophagus meets pasta,but are rich food also inserves as a mixer and intestine the stomach It prevents backward The small is the asecrets long tube grinder The intestine stomach also acid movement of food • Pancreas loosely coiled inthat the abdomen (it is more and enzymes further breakdown • Liver than long).pepsin is It is constituted of food 20 Thefeet enzyme responsible • Gall three segments, the duodenum, jejunum, for protein breakdown This combined bladder and It food continues actionileum renders leavingthe the digestion stomach Colon It isenzymes is a 5-released to 6-foot-long process using by the liquid or-paste Colon (Large muscular tube.bile It from is made of The the pancreas and the up liver Intestine) cecum, the ascending the duodenum continues (right) the colon, digestive The anuswhile is(across) the the lastcolon, part of digestive transverse thethe descending process jejunum and ileum Rectum The rectum (Latin for "straight") is an 8tract Itminerals consists of the colon pelvic Stool, floor (left) colon, and theEnzymes sigmoid absorb secreted by inch chamber that connects the colon to muscles and the two Anus or waste leftbreak overdown fromanal the sphincters digestive the pancreas protein, fat,from and the anus The rectum receives stool which regulate when andBacteria how to go to the process is stored found in carbohydrates here the colon and holds it until evacuation Free PPT’s: www.ecosystemforkids.com toilet to evacuate stool or gas the stool also synthesis vitamins www.ecosystemforkids.com • Visit the website above for more free science teaching resources for teachers and parents of students in 1st to 6th grades • Features Free | PowerPoint Lessons | Worksheets pdf | Online quizzes | Games | Board Games | Card Games | More