Download Digestion Clip by Brainpop

Digestion Clip by Brainpop
Digestion is the
process of breaking
food into small
molecules so that they
can be used by the
body.
Nutrients…
• Are substances in food that provide
energy and materials for cell
development, growth, and repair.
TWO TYPES OF DIGESTION
• Mechanical or Physical: breaking food down by
cutting, chewing and grinding.
• Chemical: breaking food into small molecules
through chemical reactions with enzymes.
Enzymes
 Enzymes are molecules that speed up the
rate of chemical reactions
 They do this without being changed or
used up.
 Enzymes also speed up reactions by
reducing amount of energy necessary for
a chemical change to begin.
Digestive Enzymes are:
AMYLASE is an enzyme secreted in the
mouth. This enzyme breaks down
carbohydrates. (starches)
PEPSIN, found in the stomach, causes
complex proteins to break down into less
complex proteins.
Enzymes are also responsible for MANY
chemical reactions in your body---not
just the ones involved in digestion!
The Digestive System
Purpose: to convert food particles into
simpler molecules that can be absorbed
into bloodstream and used by the body
Major Organs : The Alimentary Canal
Mouth
Esophagus
Organs that the food will pass
Stomach
Small intestine
Large intestine
through
Helper Organs
Pancreas –
Liver –
Gallbladder –
Your Digestive System
Mouth: Begins chemical & mechanical
digestion, glands in mouth produce
saliva, which contains amylase,
which breaks down starch
MOUTH
Your Digestive System
Esophagus: muscular tube that
connects throat to stomach. Moves
food down by squeezing (peristalsis)
ESOPHAGUS
Your Digestive System
Stomach: muscular bag where
chemical and mechanical digestion
continue; food stays here ~4 hours,
changes to chyme a thick oatmeal
like liquid.
STOMACH
Small Intestine: tube nearly 7 meters long
where digestive juices from liver and
pancreas are added; villi absorb molecules
from chyme
All digestion is completed here.
Small
Intestine
Pancreas: a small organ that produces
substances that stop the action of
stomach acid, makes enzymes that
break down carbohydrates
HELPER ORGANS
PANCREAS
Helper organs
Liver: produces bile, which is stored
in gall bladder. Bile breaks up
large particles of fats into smaller
particles.
fat
Fat
droplets
Helper organs
Gall Bladder: small sac that stores bile
produced by liver
Your Digestive System
Large Intestine: absorbs water from
undigested food, where unabsorbed
materials become more solid
Your Digestive System
Rectum: where solid wastes (feces) are
stored.
ANUS: muscles control the release of
solid wastes from the body
RECTUM
ALIMENTARY CANAL
HELPER ORGANS
1) MOUTH
2) ESOPHAGUS
LIVER
GALL BLADDER
3) STOMACH
PANCREAS
5) LG. INTESTINE
4) SMALL
INTESTINE
6) RECTUM
Digestive System Clip by Brainpop
•
•
•
•
•
Go to brainpop.com.
Log in pobms
Password = brainpop
View the Digestive System Clip by Brainpop
Answer the questions