Digestive System
Essential Question

How does the digestive system promote
homeostasis in the body
Functions
1.
2.
3.
Physically and chemically
breaks down food into
smaller pieces.
Moves digested food from the
digestive tract into the
circulatory system through the
process of absorption.
Eliminates undigested food
and waste products from the
body.
Structure
# Name
Description and Function
1 Mouth
contains teeth, which break
down food into smaller
pieces by chewing, which
allows food to be swallowed.
2 epiglottis This trap door belongs to both
the respiratory and the
digestive systems. Prevents
food and fluids from draining
into the lungs.
Structure
#
Name
Description and Function
3
Liver
The organ secretes bile that
is passed along the gall
bladder for concentration and
storage.
4
Gall
Stores and concentrates bile,
bladder and then releases it into to the
duodenum to help absorb and
digest fats.
Structure
# Name
Description and Function
5 Bile duct The duct collects bile from the
liver and the gall bladder as it
passes along to the duodenum
of the small bowel.
6 Large
The large intestine passes the
Intestine remaining essential nutrients
into the bloodstream and the
storage and elimination of
waste left-over.
Structure
# Name
Description and Function
to be a vestigial structure, (a structure
7 Appendix proposed
that has lost all or most of its original function
through the process of evolution.) Current
theory suggest that it is part of the
immune
system, it exposes the body to
antigens and manufactures
hormones during fetal
development.
8 Salivary
gland
3 main salivary glands deliver
saliva into the mouth. The
fluid helps soften up food, the
first chemical action along the
digestion trail.
Structure
#
Name
9
Tongue
Description and Function
Muscle that is used for
rolling food around your
mouth so your teeth can
work best.
10 Esophagus Carries food, liquids, and
saliva from the mouth to
the stomach through
muscular contractions
called peristalsis.
Structure
#
Name
11 Stomach
Description and Function
Gastric acids in this
organ break down
food. (Chemical
digestion)
12 Duodenum The first section of the
twenty two food long
small intestine. It is
largely responsible for
the continuing food
breaking-down process.
Structure
#
Name
13 Pancreas
Description and Function
The body’s sugar control board.
Both insulin and glucagon are
produced here. It secretes
digestive enzymes that break
down protein, fat, and
carbohydrates.
Structure
#
Name
14 Small
Intestine
15 Rectum
Description and Function
The small bowel has 3 main
sections: the duodenum,
jejunum, and ileum. The
duodenum breaks down food
into liquid form and the jejunum
and ileum absorb nutrients into
the bloodstream.
Stores and releases waste
and stool.
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