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Download 11-30 Digestive System
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ANSWER THE MONDAY BELLWORK QUESTION Bellwork 11-23-15 Diagrams 0707.1.2 and 0707.1.3 • Can I summarize how the different levels of organization are integrated within living systems? • Can I explain the basic functions of a major organ system? • How do different organ systems enable a complex multicellular organism to survive? • Students will be able to analyze how plant and animal cells are organized to carry on the processes of life? Digestive Demonstration • Take a big bite of the cracker and chew on a few minutes. • The cracker will taste bland at first, but raise your hand when you start to taste a sweet flavor. • Digestion starts in the mouth with enzymes that break down carbohydrates into simple sugar. The Digestive System • The digestive system is a group of organs that work together to digest food so that is can be used by the body. • The digestive system is a series of tubelike organs called the digestive tract. • The Digestive Tract Organs: • Mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, anus • The liver, gall bladder, pancreas, and salivary glands are also part of this system, but food does not pass through them. • Digestion • Two types of digestion: • The breaking, crushing, and mashing of food is called mechanical digestion. • In chemical digestion, large molecules are broken down into nutrients. Steps of Digestion • Steps of the Digestion: • Mouth • • Teeth- chewing (mechanical digestion) Saliva- contains an enzyme that begins chemical digestion of carbohydrates; changes complex carbohydrates (starches) into simple sugars (glucose). • Esophagus- sends food to stomach • Stomach- breaks down food into a liquid (chyme) by the action of muscle contraction (mechanical), enzymes, and acids (chemical). • Pancreas- lies behind the stomach and makes digestive enzymes and hormones that regulate sugar levels. • Small Intestine- the organ between the stomach and large intestine where most of the break down of food happens (chemical) and most of the nutrients from food are absorbed by villi. • Liver- Makes bile to break up fat. Stores nutrients. Breaks down toxins. • Gall bladder- stores bile produced by the liver • Large intestine- removes water from mostly digested food and turns waste into semisolid feces (poop). • Rectum- stores feces until it leaves the anus. View of the Inside of the Stomach The inside of a real digestive system! • Part One • Part Two BrainPop • Digestive System HBS Chart- Digestion • Function: The digestive system breaks down the food you eat into nutrients that your body can absorb. • Major Organs: esophagus, stomach, intestines, liver • How it works with other systems: The circulatory system absorbs nutrients from the small intestines to carry to the body cells. HBS Story • Make sure you have at least 3 major organs included in your paragraph for each system!
