Food Storage in Humans

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INTRODUCTION
FOOD STORAGE
EXPLAINED
FOOD STORAGE
AREAS
STORAGE OF
OTHER
MATERIALS
SUMMARY
Module 3  Unit 8  Lesson 2 1

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INTRODUCTION
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Introduction
Look at your upper arms; look at your belly! Do you
store food? If yes… what do you store? Where?
Does your body develop special organs in which to
store food the same way that plants do?
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Objectives
You should be able to:
1. identify the form in which food is stored
in the human body.
2. describe areas in the human body
where storage is most likely to occur.
3. list other substances apart from food
that might be stored in the body.
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Excess in your diet!
The excess food that you eat -
especially fat - is stored. Excess
carbohydrate and even protein
can also be converted to fat and
stored.
So .. all the excess fat that you
have anywhere in or on your body
comes from your diet!
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Storage in Mammals
In mammals, food is stored in several
ways:
• polysaccharides (starchy foods) are
stored as glycogen.
• excess sugar, such as glucose, is also
converted to glycogen and stored.
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Storage in Mammals – LIVER
Stored glycogen is called ‘animal starch’.
It is stored mainly in the liver.
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Glycogen is also stored in MUSCLES.
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Storage in Mammals
• When needed for energy–related
activities, glycogen can be re-
converted to glucose by the action
of hormones.
• NB. You will learn more about this
when you do ‘homeostasis’!
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Fat Storage – UNDER THE SKIN
Most persons store fat under the
skin. Lipids are stored as fat usually
under the skin in the abdomen or
‘belly’ region, as well as the back,
under the neck and chin, the arms
and thighs.
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Fat Storage
• Fat is also stored around many
organs and serves to cushion and
protect them.
• Stored fat serves as an insulator
and also an energy source.
Look at the fat stores (in yellow) on
the diagrams on slide 11.
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Locations of stored fat
( shown by yellow)
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Morbid Obesity from Fat Storage
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Other animals also store fat and
become obese!
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A bear stores fat before it hibernates
during winter
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Did You Know?
Obesity is responsible for:
• High Blood pressure, hypertension - is twice as
common in adults who are obese than in those
who are at a healthy weight.
• High blood cholesterol - 50% more likely to
have elevated blood cholesterol levels.
• Diabetes Type 2 - Researchers estimate that 88
to 97% of type 2 diabetes cases diagnosed in
overweight people are a direct result of obesity
• Congestive heart failure - obesity increases the
risk of congestive heart failure, a potentially
fatal condition in which the heart muscle
weakens, progressively losing the ability to
pump blood.
• Stroke !
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Storage in mammals
The excess protein from your diet
can be deaminated and the
carbohydrate part converted to
glycogen and stored.
What is deamination?
Where does it occur?
Go to the next slide and try the “Fill-in-
the blanks” exercise on Deamination.
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Read each statement and then write down words that will
correctly complete each statement. Point and click on the
statement to get feedback.
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1. Deamination is the process by which ______
____ are broken down when too much ______
has been taken in.
3. Ammonia is toxic to the human system, and
_________convert it to ______or _________.
2. It Involves the removal of an amino group
from the amino acid and it is then converted to
___________.
4. Deamination takes place primarily in the ____
and also in the __________.
1. Deamination is the process by which amino
acids are broken down when too much protein
has been taken in.
3. Ammonia is toxic to the human system, and
enzymes convert it to urea or uric acid.
2. It Involves the removal of an amino group
from the amino acid and it is then converted to
ammonia.
4. Deamination takes place primarily in the liver
and also in the kidneys.

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Storage of other materials
• Vitamins such as A, D, K , E and C,
nicotinic acid and folic acid
• Minerals e.g. iron and potassium.
• The liver may also serve as
temporary storage area for various
toxins which might be either
ingested or produced in the body
from physiological activities.
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Summary
• Plants make and store food for their own
use. Animals, such as humans who
cannot make their own food, must rely
on plants - either directly or indirectly –
for their stored food to meet the
animal’s metabolic requirements.
• When animals store excess food from
their diet, it is usually problematic and
harmful to their health and general well-
being.
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