The Digestive System Components Esophagus Stomach Small Intestine

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 greenishyellow 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 • Absorbing nutrients into the blood stream

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 Clip. Art • Microsoft Encarta Encyclopedia • My Body: Teacher Created Materials