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Digestive System What are the parts of this system?

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Presentation on theme: "Digestive System What are the parts of this system?"— Presentation transcript:

1 Digestive System What are the parts of this system?
What is the job of each part?? How does it interact with other systems? How can I best care for it?

2 Parts of the Digestive system
Teeth Salivary Glands Esophagus Stomach Liver Gallbladder Pancreas Small Intestine Large Intestine (Colon) Rectum Anus

3 Function: Digestion Breakdown of food
into basic building blocks (nutrients) Mechanical: chewing & churning Chemical: digestive juices Mouth (carbohydrates) Stomach (proteins) Small Intestine (fats)

4 Mouth Teeth: Mechanical breakdown of foods Salivary Glands:
Chemical breakdown of carbohydrates (starches & sugars)

5 Stomach Gastric Juices breakdown proteins: 1. Hydrochloric acid
2. Pepsin (enzyme that digests protein) Smooth Muscles in walls churn food to make Chyme: Creamy mixture of food and gastric juices

6 Liver Bile: Greenish fluid breaks down Fats 1. made in Liver
2. stored in Gallbladder Also changes toxins (poisons) into harmless substances. Examples of Body’s Toxins 1. Poisonous Foods, Plants, Animals 2. Alcohol & Drugs (including medicines (ibuprofen…)

7 Pancreas Produces: 1. Insulin - metabolizes sugars in the blood
2. Digestive Enzymes - for fats and proteins

8 Small Intestine 21-23 feet long…and…1 inch in diameter
Villi: finger-like projections in the walls of the small intestine lined with capillaries (smallest vessels in the circulatory system). 1. Major digestion of fats 2. All undigested food is broken down 3. Most nutrients absorbed

9 Nutrients Carbohydrates - energy Proteins – build & repair tissues
Fats - energy Vitamins – support metabolism Minerals – building blocks of cells

10 Digestive Processes Mechanical Breakdown: chewing & muscles
Chemical Breakdown: enzymes & ‘juices’ Peristalsis: Involuntary muscle contractions that mix and move food through the digestive tract

11 Large Intestine 5-6 feet long…and …2-3 inches in diameter
Last Chance!! Final nutrients pass into the blood stream 1. Water 2. Vitamins 3. Mineral Salts

12 Absorption & Elimination
Absorption: Nutrients pass into blood stream Provide 1. Energy to power muscles 2. Substances to repair tissues Elimination: Undigested food leaves body Cellulose from vegetables & fruits

13 Diseases Ulcers – sores Diabetes I & II – blood sugar, pancreas
Hyperglycemia & Hypoglycemia Itis = ‘inflammation of’ Appendicitis – appendix Pancreatitis – pancreas Ulcerative Colitis/ Chron’s Disease Gallstones – mineral rocks in the Gall Bladder Eating Disorders Obesity, Anorexia Nervosa, Bulimia

14 Ulcers

15 Best Care Diet with all Nutrients 1. Proteins, Carbohydrates, Fats
2. Vitamins & Minerals 3. Fiber – fruits & vegetables Rest and Digest Low stress at mealtimes Exercise 1. Improves blood circulation 2. Decreases stress 3. Massages organs

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