Download The Digestive System

The Digestive System
Digestive System
 Starts at the mouth and ends at the anus
 Specific organs do specific jobs as food is moved
through this system
Step 1: The Mouth!
• The digestive process begins in the mouth.
• Salivary glands produce saliva into the mouth
to help with swallowing. They help break down
to make it easier to swallow
Step 2: Swallow chewed
food
• After food is swallowed it enters the
esophagus
• The esophagus is located between the
mouth and the stomach
• It helps pass the food along using
rhythmic, wave-like muscle movements
(called peristalsis) to force food from the
throat into the stomach.
Step 3: Begin digestion!
The stomach is a large, sack-like organ
it churns the food and bathes it in a very
strong acid (gastric acid)
• The liver is a gland that opens into your gut
and helps with digestion by secreting bile
and storing blood sugar
• The pancreas is a gland that releases
digestive enzymes and the hormone insulin
which go into the blood stream
•
•
Step 4: Further digestion
and absorption of nutrients
• In the small intestine - After
being in the stomach, food
enters the duodenum, the first
part of the small intestine
• In the small intestine, bile
(produced in the liver and stored
in the gall bladder), pancreatic
enzymes, and other digestive
enzymes produced by the inner
wall of the small intestine help in
the breakdown of food
Step 5: Absorb remaining
nutrients and water.
After passing through the
small intestine, food
passes into the large
intestine
• In the large intestine,
some of the water and
electrolytes (chemicals
like sodium) are removed
from the food
• Feces are prepared and
stored in the large
instestine
•
Step 7: The End of the
Process
• Solid waste is then stored in
the rectum until it is
excreted via the anus
• rectum- part of the
intestines just before the
anus
• anus- where undigested
remains of food pass