Digestion By: Mr. Hunter

Eeeewww! How long are your intestines? At least 25 feet in an adult. Be glad you're not a full-grown horse -- their coiled-up intestines are 89 feet long! Chewing food takes from 5-30 seconds Swallowing takes about 10 seconds

Food sloshing in the stomach can last 3-4 hours. It takes 3 hours for food to move through the intestine Food drying up and hanging out in the large intestine can last 18 hours to 2 days!

Americans eat about 700 million pounds of peanut butter. Americans eat over 2 billion pounds of chocolate a year. In your lifetime, your digestive system may handle about 50 tons!!

Where does digestion begin? Digestion begins in the _____.

What does your mouth do? Your mouth produces saliva. Enough saliva is produced in one day to fill a 12-oz soda bottle.

What next, mouth? The food is balled up into a bolus and is pushed towards the back of your throat. The bolus then travels down your esophagus.

Esophagus

2-3 seconds spent in the esophagus stretchy pipe 10 inches long Epiglottis 2-3 seconds spent in the esophagus

Food then moves to the stomach.

What are your stomach’s jobs? to store the food you've eaten to break down the food into a liquidy mixture to slowly empty that liquidy mixture into the small intestine

Stomach Your stomach is a mixer and a churner. It contains gastric juices, acids that help to break down food and kill any bacteria accidentally consumed.

Broken down nutrients are _____ by the small intestine. Chemicals released by the pancreas, liver, and gallbladder break down nutrients. Broken down nutrients are _____ by the small intestine.

Small Intestine

Liver Largest internal organ of the body Filters blood Stores unneeded nutrients for later use Produces bile (breaks down fats)

Liver

Gallbladder Stores bile

Pancreas Breaks down proteins, fats, and starch Extremely important chemicals for digesting and absorbing food substances

Large Intestine Water and some other nutrients are absorbed from the digested material Solid material is compacted and stored here.

Solid material leaves here Anus Solid material leaves here Internal and external anal sphincter muscle

Food Flight Imagine you are food traveling through the digestive system. You are going to make postcards to describe your trip. Using your notes, you are going to write about your trip and include some major stops along the digestive tract.

Digestive System Postcards Choose a food. On one side of the postcard, include a picture of something that the food might see or pass through. On the other side, include a description of your experience at this point of the digestive system.

(mouth, esophagus, stomach, small intestine, large intestine, liver) Food Flight Rubric All stops included _____ 10 pts. (mouth, esophagus, stomach, small intestine, large intestine, liver) Creativity _____ 10 pts. Accuracy of drawings _____ 20 pts. Accuracy of description _____ 30 pts. Time management _____ 20 pts. Name on Project _____ 10 pts.

DIGESTIVE SYSTEM MODEL