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0200025Cornell NotesTopic/Objective: Students will be able to identify theName:Functions of the digestive and excretory systems.Class/Period:Date:Essential Question: What are the functions of the digestive?Questions:Notes: Digestive System:The three functions of the digestive system:Breaking down food into smaller moleculesAbsorbing nutrients into our blood for energyPreparing food for wastePhysical digestion(change)- material is broken down without adding additional substances. EX: chewing muscles mixing in stomachChemical digestion(change)- material is broken down with substances creating a chemical reaction. EX: saliva mixing in mouth When nutrients are absorbed in small intestine Major Organs of the digestive system & the process:Mouth/ Tongue- chews food and breaks it down for swallowing.29114759080500Saliva- enzymes(proteins) and mucus in your mouth that help break down the larger molecules into smaller ones. Esophagus- hollow tube that connects the mouth to the stomach. Peristalsis- the waves of muscle contractions that move the food down the esophagus.Stomach- flexible baglike organ that contains enzymes (stomach acid) that help to break down food molecules further through the action of Churning (mixing the food in the enzymes).Small intestine- long wound-up tube that helps digest food and absorbs the nutrients from the food through the Villi (fingerlike projections that cover the inside of the intestine)Large intestine- long wound-up tube that collects what is not absorbed in the small intestine. Also absorbs the water from the remaining waste.Rectum- Where waste is stored, Anus releases it.What are the functions ofThe digestive system?What are the major organsAnd their functions in the Digestive system?Summary: ................
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