Digestive System
What does the digestive system do? The main functions of the digestive system are: to breakdown foods into nutrients that can be used by the body absorb nutrients that are necessary for energy, growth, and maintenance and rid the body of solid wastes.
What are the major organs of the Digestive System Primary Organs Mouth Esophagus Stomach Small intestines Large intestines Rectum Anus Secondary organs Liver Gallbladder Pancreas
What is digestion? the process of making food absorbable by dissolving it and breaking it down into substances the body can use
What are the types of digestion? Mechanical digestion – physical process of breaking down food (chewing, grinding, smushing, tearing, churning) Chemical digestion – chemical process of breaking down food
What is the function of the mouth? Begins to break down food into smaller pieces through mechanical digestion saliva in the mouth starts the process of chemical digestion
What is the function of the Esophagus? The transport tube that carries chewed food to the stomach Peristalsis
What is the function of the stomach? Continues the process of mechanical digestion secretes gastric juices that continue the process of chemical digestion started in the mouth
Small Intestines The organ where most of the chemical digestion of food takes place nutrients from food are also absorbed through the small intestines
Large intestines The organ where water is absorbed from the food and taken into the bloodstream It prepares the remaining undigested food for elimination from the body
What is the rectum? The rectum is a short tube that stores solid waste until it is eliminated from the body through the anus.
the external opening of the rectum What is the anus? the external opening of the rectum
Do you know the order food travels? Person A describe the path food takes when you eat it. Person B use your notes to check your partner. Swap roles and do it again!
How does the Liver help digestion? It is secondary organ of the digestive system It makes bile Bile is used by the body to break up fat particles.
How does the gallbladder help digestion? It is a secondary organ to the digestive system It stores the bile made by the liver.
How does the Pancreas help digestion? It is a secondary organ to the digestive system It makes digestive juices that help to break down the food in the small intestine.