Download Body Systems and Your Health - St. John Paul II Collegiate

Body Systems and Your Health
Read page 154-155
Are you anemic – deficient in iron?
BLM 2-28
Blood components and their functions
Plasma is the liquid portion of blood, and
it carries nutrients, waste products
(CO2), hormones and blood cells to and
from cells.
Red blood cells contain hemoglobin, which
attracts oxygen and carries oxygen to
the cells.
White blood cells defend the body
against infection and disease (some types
engulf “foreign” invaders such as
bacteria).
Platelets are responsible for the initial
stages of blood clotting
A Healthy Circulatory System
Disorders of the circulatory system are
the leading cause of death in North
America. One of the most common is high
blood pressure. See poster and model.
Read anemia in “Biology of ourselves”
Blood Pressure
A sphygmomanometer is used to measure
blood pressure. This device determines:
- the volume of blood – if you lost a lot of
blood, you will have low blood pressure.
- the heart rate – a fast heart beat
pushes blood rapidly through the
arteries, building up blood pressure.
- artery size - small, narrow, or partly
clogged arteries produce high blood
pressure.
- artery elasticity – loss of elasticity
results in hardening of the arteries
producing higher blood pressure.
- blood viscosity – thicker blood (higher
ratio of RBC to plasma) flows slower
Avoiding disorders/problems of the
circulatory system: Choose a healthy
lifestyle:
 Don’t smoke
 Eat a proper diet
 Get regular exercise
Read page 157.
Disorders of the Digestive System
What would you rather eat and why.
1)Chesseburger, fries, soft drink, onion
rings, ice cream
2)
Roast chicken sandwich, carrot,
celery sticks, cherry tomatoes, juice,
low-fat yogurt
How many times have you seen that highfat meal advertised in comparison to the
low-fat lunch?
A lot of money goes into advertising to
persuade people to buy fast foods.
It is ironic that at a time in history when
we have products available year-round
from every corner of the world; when
there are magazines, television shows,
web sites, etc. devoted to food and
exotic recipes; when large numbers of
people have generous disposable incomes
– still the North American population,
particularly the young people, are not as
well-nourished as might be expected.
Our society seems to be encouraged to
have little respect for food. We regard
it as a “fun” item, and advertising the
latest “kid” meal at the local fast food
outlet, with various media-linked toys
that come with it. From an early age,
many children become accustomed to a
high-fat, high-sugar, low-fibre, lownutrient diet. For an alarming number of
people, this is a typical diet. Many people
seem unable to make the connection
between what they eat and the way their
bodies perform. A poor diet can lead to
serious disorders of the digestive
system, but it can also detract from an
overall sense of well-being, energy loss,
poor hair and skin tone, and a feeling of
tiredness.
Read pages 158-159
A Healthy Respiratory System
Read page 160
Smoking, air pollution, and industrial byproducts such as coal dust are related to
disorders of the respiratory system.
What do you think about government
advertising against smoking? Does it
work or not? How could you improve the
advertising?
Page 161 #1-3
Read page 162
Page 162 #1-4
Page 163 #1-9
Page 168 #1-17, 19-22
BLM 2-30 – Design Your Own ET