Download Circulatory System

Circulatory System
Circulatory System: body’s transport
system. Allows body to move materials
from one place to another, which are carried
in the blood.
Heart: Muscle that acts as the pump for the
circulatory system.
Blood vessels: Tubes that carry blood
throughout the body.
3 types of Blood Vessels:
Arteries: Carry oxygen-rich blood AWAY
from the heart.
Veins: Carry oxygen-poor blood TOWARD
the heart.
Capillaries: very tiny branches of arteries
and veins. They connect the smallest
arteries with the smallest veins.
Cholesterol: Waxy, fat-like substance made
in liver & found in certain foods such as
foods from animals. (milk, cheese, meat)
Keeping Your Circulatory System Healthy
1. Eat a balanced diet: prevents clogged
blood vessels & high blood pressure.
2. Avoid Stress: Tension strains the heart
& blood vessels.
3. Try to maintain your ideal weight:
Carrying extra weight puts strain on
your heart.
4. Exercise: Regular activity helps the
heart & circulation.
5. Don’t smoke: Chemicals in smoke
reduce the amount of oxygen your red
blood cells can carry.
How Exercise Affects the Heart
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Physical inactivity increases the risk of heart
disease. Physical activity fights against
heart disease risk factors by:
1.Reducing blood cholesterol
2. Reducing blood pressure & resting heart
rate, which decreases the workload on
the heart.
3. EXERCISE!!!: Regular activity helps
the heart & circulation.
4.Helps relieve stress.
5. Helps with weight loss.
Effects of Smoking on the Heart
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 Smoking damages the heart and blood
vessels.
 Cigarette smoke increases the activity
of blood platelets, which cause blood to
clot.
 Reduces the ability of blood vessels to
dilate (expand) and contract to adjust
blood flow.
 These changes contribute to artery
blockages, which can cause heart attack
or stroke.
Materials Carried in the Blood
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 Dissolved oxygen from lungs goes
from blood into cells. Cells need oxygen
to get energy from food.
 Dissolved food particles go to cells
to nourish them.
 Blood carries special cells that fight
germs.
 Blood carries hormones, chemicals,
to cells from places in the body where
they are made. Hormones cause cells to
grow or change in some way.
 Dissolved wastes exit cells & are
removed from body.