2Georgia Performance Standard S7L2 Students will describe the structure and functionof cells, tissues, organs, and organ systems.c. Explain the purpose of the major organsystems in the human body (i.e. digestion,respiration, reproduction, circulation,excretion, movement, control, andcoordination, and for protection fromdisease.)
3Essential QuestionsWhat digestive processes occur in the small intestine, and how are other digestive organs involved?What role does the large intestine play in digestion?
4The Small Intestine Almost all chemical digestion and absorption of nutrients takes place in thesmall intestines.
5The Small IntestineWhen fluid leaves the stomach, it goes to the small intestine. The small intestine is the part of the digestive system where most chemical digestion takes place.Chemicals from the small intestine and other nearby organs break down the rest of the food molecules in the small intestine.The lining of the small intestine is covered with millions of tiny bumps called villi. When digestion is finished, food molecules pass through the villi into the blood
6The Small Intestine What takes place in the small intestine? Almost all chemicaldigestion and absorptionof nutrients takes place inthe small intestine.
7The Small Intestine 2. List the three organs that produce the enzymes andsecretions used in the smallintestine.a. small intestineb. liverc. pancreas
8The Liver 3. The largest organ inside the body, which is located in theupper right part of theabdomen, is the liver.
9The Liver 4. A substance made by the liver that breaks up fat particles is calledbile.
10The Gallbladder 5. What is the role of the gallbladder? gallbladder is tostore bile.
11The Pancreas 6. Enzymes produced by the pancreas help break down starches, proteins,and fats.
12Absorption in the Small Intestine 7. The tiny finger- shapedstructures that cover theinner surface of the smallintestine are called villi.(singular villus)
13Absorption in the Small Intestine 8. Nutrient moleculespass from the smallintestine into thebloodstreamthrough the villi.
14The Large Intestine . As the material moves through the large intestine, water is absorbed into the blood stream.The remaining materialis readied for eliminationfrom the body.
15The large IntestineAny material that is not absorbed in the small intestine moves on to the large intestine. The large intestine is the last organ in the digestive system.The main job of the large intestine is to remove water from the material that passes through itThe waste material that is left leaves the body through the anus. The anus is an opening to the outside of the body.
16The large Intestine 1. The bacteria in the large intestine feed on the material passing through and make certainvitamins for the body.The short tube at the end of the large intestinewhere waste material is compressed iscalled the rectum.3. Circle the letter of the muscular opening through which wastes are removed from thebody.a. rectum b. anus c. pancreas
17Assignment Using your notebook paper, answer the essential questions Assignment Using your notebook paper, answer the essential questions. Write the questions and the answers.
18Essential QuestionsWhat digestive processes occur in the small intestine, and how are other digestive organs involved?The small intestine is where most chemical digestion takes place.Enzymes and secretions produces by the small intestines, the liver, and pancreas finish the chemical digestion of foods.
19Essential Questions The role of the liver is to produce bile. Bile is a substance that breaks up fat particles.Bile flows from the liver into the gallbladder, the organ that stores the bile.The pancreas produce enzymes that flow into the small intestine and help break down starches, proteins, and fats.
20Essential QuestionsWhat digestive processes occur in the small intestine, and how are other digestive organs involved?
21Essential QuestionsWhat role does the large intestine play in digestion?The large intestine contains bacteria that feed on material passing through.As material move through the large intestine, water is absorbed into the blood stream. The remaining material is readied for elimination from the body.