Download Chapter 8, lesson 1: How the body digests food notes Digestion

Chapter 8, lesson 1: How the body digests food notes
 Digestion:
 Your
your body to use.
system
food for
 Food contains
.
 Food is
much
to enter cells  it must be broken down into
.
 Food must be
.
 Food contains:
,
,&
 Digestion
cells to use.
from food for your
 Digestion begins inside your
:
 Your
your

.
and
chew and crush food while
turns the food over.
digestion makes food smaller.

release saliva
 (contains
)

digestion
 Enzyme = protein that causes
reactions)
(speeds up

into sugars.
in saliva break down
 Different enzymes work in different areas of the digestive system
 The esophagus:
 When you swallow, the food moves from your mouth into your
 From the pharynx, it enters the
 Long
that connects the mouth to the
(throat).
.
.
 Smooth muscles
, or squeeze together.
 Pushes food down toward the stomach.

= the
moves food through digestive system.
that
 The stomach:
 Food enters the stomach where
walls
.
 Churns and
of the stomach
food
 Digestive juices are secreted into the mixed food

and
.
 Special lining
stomach from acids
until it
of food are broken down further
.


= liquefied food that exits the stomach
 The small intestine:
 A coiled

that is about
(13-23 feet) long
digestion occurs here
 Organs and glands


digestion:
: makes
that breaks apart
:
molecules
bile.
 Bile enters small intestine via bile duct.

: gland that secretes
carbohydrates, proteins and fats.
 Food molecules are now
small intestine to be taken to your cells.
that digest
to be
by
 Finger-like structures called

line the small intestine.
so more can
into the blood vessels of the villi.
be

carries food to your cells.
 The large intestine:
 Some material cannot be
by
. It is sent to the large intestine
.
 Main function: Remove
from undigested material
 Water is
to the body.
 Undigested material forms a
 Stored in
called
.
for a short time.
 Smooth muscles contract and push
through an
 The complete journey of food through the
about
hours.
called the
out of the body
.
takes