Transcript Explain the difference between mechanical and chemical digestion.

The Digestive
Process Begins
Final Digestion
and Absorption
The Digestive
Process Begins
Final Digestion
and Absorption
Dissection or
Mixed Bag
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List the three major kinds of
teeth we have. What kind of
digestion do they perform?
100
Incisors, canines, molars.
200
Explain the difference between mechanical
and chemical digestion.
200
Mechanical digestion is the physical
break down of food.
Chemical digestion is when chemicals in
the body are used to break down foods
into their smaller chemical building
blocks.
300
How does the body keep food from
going down the “wrong pipe”?
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There is a flap of tissue called the
epiglottis that seals off your trachea
as you swallow food.
400
Define enzyme.
400
An enzyme is a protein that
speeds up chemical reaction in
the body.
500
How does an ulcer form?
500
In many cases, a bacteria called H.
pylori weakens the mucus layer of
the stomach as it lives just below
the mucus layer. Stomach acid then
can damage the sensitive lining of
the stomach.
100
Approximately how long is the
small intestine?
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6 meters
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What’s the function of the
rectum?
200
It’s function is to compress
waste into solid form.
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What’s the benefit of bacteria located in
the large intestine?
300
As they feed on the material in the large
intestine, they produce vitamins for the
body to use.
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Explain specifically how fiber
helps the digestive system.
400
Fiber helps thicken the material in the
small intestine, which then allows
peristalsis work effectively.
500
Explain the relationship
between diarrhea and the
function of the large intestine.
500
Diarrhea is a condition when the waste
material in the large intestine contains
too much water. A function of the large
intestine is to absorb the appropriate
amount of water from waste material.
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What are the two types of
digestion?
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mechanical and chemical
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What is the muscular tube that
connects the mouth to the
stomach called?
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esophagus
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What are the involuntary
waves of muscle contraction
called that occur in the
esophagus, stomach and other
areas of the digestive system?
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peristalsis
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What are the two components
of digestive juice?
400
pepsin and hydrochloric acid
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What substance do the cells in
the stomach produce to protect
the stomach lining?
500
mucus
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Where in the digestive system does
nearly all of the chemical digestion
take place?
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small intestine
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What are the millions of tiny
finger-shaped structures that
absorb nutrient molecules
called?
Where are they found?
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villi
(villus – singular)
They are found in
the small intestine.
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What is the function of bile?
300
Bile physically breaks up fat
particles into smaller fat droplets
so they can next be broken down
by enzymes produced in the
pancreas.
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What major role does the
pancreas play in digestion?
400
The pancreas produces
enzymes that flow into the
small intestine and help to
break down starches, proteins,
and fats.
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In what part of the digestive
system is Vitamin K produced?
How is it produced?
500
large intestine
The large intestine contains
bacteria that produce certain
vitamins, such as Vitamin K.
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What is absorption (be very
specific)? Why is it important?
100
Absorption is the process of
passing nutrients through the
walls of the digestive system
into the bloodstream.
Absorption is important in
transporting nutrients to all
the parts of the body.
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What was the largest (non-hollow)
organ found inside the body?
200
liver
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What are the 3 functions of the
digestive system?
300
1. Breaks down food into molecules
for use.
2. Molecules absorbed into blood and
carried throughout the body.
3. Wastes eliminated from body.
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How long is the entire digestive
system? How long is the small
intestine? How long is the large
intestine?
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All – 9 meters
Small – 6 meters
Large – 1.5 meters
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Why does a chewed up
Saltine cracker breakdown
starch into glucose more
quickly than a handcrumbled Saltine cracker?
500
Saliva produces an enzyme
called amylase that breaks
down starch into glucose.
FINAL JEOPARDY
The Digestive System
List the progressive order of the
following terms from start to
end of digestion:
villi, rectum, pepsin, incisor,
epiglottis, water absorption,
salivary gland
incisor
salivary gland
epiglottis
pepsin
villi
water absorption
rectum