The Digestive System

Components Esophagus Stomach Small Intestine Large Intestine Gall bladder Liver Pancreas

The Digestive System

Functions of the digestive system Ingestion Mechanical processing Digestion Secretion Absorption Excretion

Esophagus the tube that connects your mouth and your stomach Mechanical

Stomach A stretchy bag that holds your food after you eat J shaped Helps to break food into smaller pieces so your body can use it for energy and nutrition Chemical

Esophagus Stomach

Small Intestine Tube that is 20 feet long. Continues to digest food Food stays in your small intestine for 4 to 8 hours Absorption of nutrients

Small Intestine

Large Intestine Tube that is 5 feet long Gets waste from small intestine Waste stays for 10 to 12 hours Removes water

Large Intestine

Gall Bladder Storage tank for bile (a greenish-yellow liquid) that helps your body break down and use fats Located under your liver Shaped like a pear

Gall Bladder

Liver Factory for antibodies and bile Stores vitamins and sugars until your body needs them

Liver

Pancreas Helps you digest food by breaking down sugars

Functions Digest the food we eat Take the nutrients out of your food so your body can use it

Healthy Habits Eat foods that are high in fiber like fruits and vegetables

Drink plenty of water

Chew your food completely before you swallow

Avoid foods high in fat

Interesting Facts Food is in your digestive system for about 24 hours

Your stomach stretches when you eat like a balloon being filled with air

You have a trap door called the epiglottis to cover your windpipe when you swallow.

Your stomach mashes your food the way a baker kneads dough for bread.

Review Brain-You think about food and start to salivate Mouth – Crushing and grinding Stomach – Chemical Breakdown Small Intestine – Useful material extracted Colon – Water removal

Digestive Organ’s Functions Salivary Gland There are three main glands that deliver saliva to soften the food Epiglottis This is a trap door that covers the trachea to prevent food and fluids from draining into the lungs Esophagus This is a muscular tube that takes the food to the stomach. The contractions are called PERISTALSIS Stomach This is where the food goes and gets melted into a thick soup by the GASTIC ACIDS

Digestive Organ’s Functions Small Intestine It has three parts, duodenum, jejunum and ileum. Duodenum Is responsible for continuing to break down of food Jejunum Absorbing nutrients into the blood stream Iluem

Digestive Organ’s Functions Pancreas The body’s sugar control board. Produces insulin and glucagon Liver Food doesn’t pass through this organ, instead the liver secretes bile Gall Bladder Stores bile from the liver and releases bile into the duodenum Appendix We do not need our appendix, sometimes a piece of food gets stuck in here and causes an infection.

Digestive Organ’s Functions Large Intestine Also known as the colon. It has three major parts, ascending colon, transverse colon and descending colon. Rectum Part of the colon, used to store waste for disposal. Gall Bladder Stores bile from the liver and releases bile into the duodenum

Summary Functions Digests food Absorbs nutrients for the body Components Esophagus Stomach Small intestine Large intestine Pancreas Liver Gall Bladder

Summary Healthy Habits Eat high fiber foods Drink lots of water Chew food well Avoid high-fat foods

Works Cited Microsoft ClipArt Microsoft Encarta Encyclopedia My Body: Teacher Created Materials