1. The Digestive System

2. Organs In The Digestive System
The energy you need for life comes from food.
Major Organs:
Mouth
Esophagus
Stomach
Small Intestine
Large Intestine
Rectum
Anus
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Processing Food
Turning your food into energy occurs in four phases:
Ingestion – taking in food (eating).
Digestion – breaking down food.
Absorption – food particles are
transported to cells to be used.
Elimination – molecules of food not
used are passed out of your body
as waste.
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Digestion
The process that breaks down food into small molecules so they can move into the blood.
Mechanical digestion – when food is chewed and mixed in your mouth or churned in your stomach.
Chemical Digestion – breaks down large molecules of food into different smaller molecules that can be absorbed by cells.
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5. The path a burrito takes…
Begins in your mouth:
Your tongue and teeth break up food into smaller pieces (md).
Saliva turns your food breaks down
food into a soft mass (cd).
Esophagus
Tube that connects your mouth and
stomach.
No digestion occurs here.
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Stomach
Muscular bag
Food is broken down with your muscles (md).
Food is further broken down with
your digestive juices – hydrochloric
acid and enzymes (cd).
Small Intestine
Liver produces bile to breakdown
fat into smaller pieces (also removes
toxins) (cd).
Pancreas secretes juices to breakdown carbohydrates, proteins, and fats (cd).
Pancreas produces insulin.
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Small Intestines (cont)
Food is now a soupy mixture.
Mixing continues.
Absorbed through the small
intestine.
Large Intestines
Food is still thin and watery.
Absorbs the water (or you
become dehydrated).
Remaining materials become more solid.
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Rectum
Store house for poop until you are ready to go to the bathroom.
Anus
Where poop passes through to leave your body.
Watch the path food takes as you digest it.
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Excretory System
Works to remove wastes from your body.
Kidneys, bladder, and connecting tubes
Urinary System
rids your blood of wastes produced by the metabolism of nutrients.
Controls blood volume by removing excess water produced by body cells.
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Fun Facts!
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!!
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