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Transcript
How Carbohydrates are
broken down
What is the Digestive System?
Food provides us with fuel to live, energy to
work and play, and the raw materials to build
new cells. All the different varieties of food
we eat are broken down by our digestive
system.
Review of Digestive System from
Health
What does the Mouth Do?
 The
mouth mixes the food with watery
saliva, from 6 salivary glands around the
mouth and face, to make it moist and
slippery.
The Stomach
 Uses
enzymes to break down the protein
in the foods to amino acids that can be
used by the body.
The Pancreas
 Continues
to break down the food into
smaller molecules that the body can easily
use.
The Pancreas is
behind the stomach
and food passes through
there before going to the
intestines
The Small Intestine
 Here,
more enzymes continue the
chemical attack on the food. They are
carried away to the liver and other body
parts to be processed, stored and
distributed.
 All
foods are broken
down at this point.
The Liver

Blood from the intestines flows to the liver, carrying
nutrients, vitamins and minerals, and other products from
digestion. The liver is like a food-processing factory with
more than 200 different jobs. It stores some nutrients,
changes them from one form to another, and releases
them into the blood according to the activities and needs
of the body.
The Large Intestine

Any useful substances in the leftovers, such as spare
water and body minerals, are absorbed through the walls
of the large intestine, back into the blood. The remains
are formed into brown, semi-solid feces, ready to be
removed from the body.
Breakdown of foods
Starch → Maltose → Glucose
Protein → Amino Acids
Sucrose (table sugar) → Fructose + Glucose
Fat → Fatty Acids + cholesterol