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Breaks down food into nutrients.

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Presentation on theme: "Breaks down food into nutrients."— Presentation transcript:

1 Breaks down food into nutrients.
Digestive System Breaks down food into nutrients.

2 Made up of: Mouth Esophagus Stomach Salivary glands Small intestine
Large intestine Rectum Anus Food does not travel through: Salivary glands Liver Pancreas Gall bladder

3 Types of Digestion Mechanical Digestion Chemical Digestion
Grinding and mashing of food into smaller pieces. Chemical Digestion Breaking down of food into nutrients using acids and enzymes

4 Proteins- Broken down into amino acids
Used to build muscle Occurs in stomach continues in small intestine. Carbohydrates- Broken down into simple sugars Used for energy Starts in mouth, continues in small intestines. Fats- Broken down into fatty acids Used for stored energy

5 Digestive Tract Food travels through the following organs: 1.Mouth
2.Esophagus 3.Stomach 4.Small intestine 5.Large Intestine 6.Rectum 7.Anus

6 1. Mouth Digestion begins here. Both mechanical and chemical digestion take place. Teeth will chew and mash food into smaller pieces. (mechanical digestion) Salivary glands found around your mouth produce saliva that begin chemical digestion of carbohydrates.

7 2. Esophagus The esophagus is a long tube that connects the mouth to the stomach. Food moves through the esophagus by peristalsis. Peristalsis is a rhythmic muscle contraction that squeeze food down.

8 3. Stomach Bag-like organ where digestion occurs. .
Mechanical digestion takes place when the stomach churns. Chemical digestion takes place when pepsin in an acidic environment breakdown food into nutrients. Protein is chemically broken into amino acid .

9 Long but narrow tube where final digestion takes place.
4. Small Intestine Long but narrow tube where final digestion takes place. Chemical digestion takes place in the small intestine. Enzymes digest proteins and fats. Nutrients are absorbed into the bloodstream through villi. Villi are finger-like projections found in the small intestine. Villi

10 Bile Bile helps to digest fats in the small intestine.
Bile is made in the liver and stored in the gall bladder. liver gall bladder

11 Pancreas The pancreas releases chemicals (pancreatic juices) into the small intestine to help digestion. Stomach acid is neutralized with bicarbonate before it enters the small intestine.

12 5. Large Intestine Undigested food ends up in the large intestine.
Excess water is removed from undigested food to create solid waste. Bacteria in LI makes Vitamin K 6. Rectum -Solid waste or feces is stored here. 7. Anus -Solid waste leaves the body through here.

13 mouth teeth salivary glands esophagus liver stomach gall bladder pancreas large intestine small intestine rectum

14 mouth esophagus stomach anus liver, pancreas small intestine gall bladder duodenum large intestine

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