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    Add as FriendThe Digestive System

    by: Farouk

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    1 : A PRESENTATION AND EXERCISE FOR MIDDLE AND HIGH SCHOOL STUDENTS BY Farouk El-Sabban College for Women Kuwait University The Digestive System!!!
    2 : The Digestive System The purpose define the function of each organ the pathway food takes through the digestive tract
    3 : Work Sheet Fill in the Blank
    4 : The Digestive System The organs and parts of the digestive pathway: Oral cavity Pharynx Esophagus Stomach Small Intestine Large Intestine
    5 : Digestive System Teeth Tongue Liver Pancreas
    6 : Digestion The process that breaks down food into substances that can be absorbed by the body for energy, growth, and repair. Digestion
    7 : Ingestion: Mouth, Teeth & Tongue The function of the mouth is to ingest food sources The teeth are used for mastication breaking food down into smaller pieces The tongue forms food into a ball to prepare for swallowing
    8 : Ingestion of Food Mouth, Teeth & Tongue The mouth, teeth, and tongue play a role in mechanical digestion. Mechanical digestion physically prepares food for chemical digestion by enzymes – starting from the stomach.
    9 : Salivary Glands Secretes saliva a watery solution containing an enzyme that starts the digestion of starchy materials Cleanses the mouth Dissolves food chemicals Moistens food
    10 : Salivary Glands The salivary glands begin the process of chemical digestion.
    11 : Pharynx After leaving the mouth, food is passed on to the pharynx. As you swallow: Uvula: prevents food from passing into the nasal cavity. Epiglottis: prevents food from entering the trachea – the wind pipe.
    12 : The Esophagus Food and liquids pass through the pharynx into the esophagus – to reach the stomach. It extends from the pharynx to the stomach – about 25 cm in length. Primary Function: Carries foods and liquids to stomach Uses peristalsis, a type of movement caused my smooth muscles in the wall that moves food though the digestive tract.
    13 : The Stomach Located below the esophagus A hollow saclike organ Consists of three layers of smooth muscles Flexible, allowing it to expand when you eat a meal.
    14 : The Stomach A temporary “storage tank”, where the chemical breakdown of proteins begins. The food is mixed together with the gastric juice, secretions from the stomach’s lining. containing pepsin and hydrochloric acid.
    15 : The Stomach As the stomach fills: stomach contracts. churns to mix the food and gastric juice together. This produces chyme a creamy, fluid mixture of food and gastric juices.
    16 : The passage of digested food from the digestive tract into the circulatory system. The small intestine is the major absorption site. Absorption
    17 : The Small Intestine The major part of digestion and absorption. 20 to 23 feet in length. Secretions from the pancreas, liver, and intestinal juices complete the chemical breakdown of all food particles.
    18 : The Small Intestine Millions of fingerlike projections on the inside of the small intestine known as villi. Each villus contains a network of capillaries which absorb digested food particles from the small intestine. Absorbed sugars and amino acids enter the blood capillaries and are carried to the rest of the body. Fat particles are carried away from the small intestine through another set of capillaries known as lymphatic.
    19 : The Small Intestine There are 3 parts to the small intestine: Duodenum Food enters here from the stomach. Jejunum The middle section of the small intestine. Ileum Allow one way flow into the large intestine.
    20 : The Liver & Pancreas Liver: 2nd largest organ in the body. Acts to clear the blood of toxins then excretes them in the bile. Bile is a yellowish-green, bitter fluid that is important in the breakdown of fats.
    21 : The Liver & Pancreas The pancreas produces many enzymes: Trypsin, which digests proteins. Amylase, which digests carbohydrates. Lipase, which digests fats. Enzymes that digest nucleic acids. The juice from the pancreas and bile empty in “C” part of the duodenum.
    22 : The Gallbladder Storage organ for bile produced by the liver. Located below the liver The small intestine stimulates the release of bile into the duodenum. Bile is required for the digestion of fats.
    23 : Large Intestine Starts Ascending colon Ends at the anus. A.K.A. the colon 5 to 6 feet long
    24 : The Large Intestine Unabsorbed materials: leave the small intestine in the form of liquid and fiber. enter the large intestine Absorbs most remaining: Water. Vitamins.
    25 : The expulsion of undigested food or body wastes. Elimination
    26 : Elimination Harmless bacteria in the large intestine change the consistency of the undigested food into a semisolid waste, called feces. Feces passes out of the body through the anus. It also termed as “bowel movement”.
    27 : Quiz Time: Name These Organs
    28 : Lifestyle & Dietary Factors Eat at least 3 servings from a variety of fruits and vegetables to avoid constipation. Practice good hand washing hygiene. Throw food away after it falls on the floor. Wash all foods before eating. Decrease to a minimum consumption of drinks that contain caffeine - such as tea and coffee.
    29 : Medications Some over the counter drugs that will help aid in the relief of constipation and diarrhea. Diarrhea a. Imodium AD b. Pepto-Bismol Constipation a. Citrucel b. Ex-Lax
    30 : Stats of Constipation & Diarrhea
    31 : Create Your Own Digestive System “A Fun Exercise” Each group will be representing a different part the digestive tract A member from each group will stand in front of the class and explain their organs function during the process of digestion Be creative and have fun with the activity
    32 : Discussion Time
    33 : THE END

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