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Your Circulatory System
In this lesson, you will Learn About…
 What your circulatory system does.
 The different parts of your circulatory system.
 Keeping your circulatory system healthy.
Bell Work
Compare and Contrast these muscles:
Skeletal Muscle
Cardiac Muscle
Smooth Muscle
Standards
1: The student will comprehend concepts
related to health promotion to enhance
health.
Indicators/ E. Q.
Explain what your circulatory system does
and the different parts that make up the
circulatory system?
Relevance
Since our Skeletal and Muscular systems
work together to help us move, how does
the circulatory system help?
Your Circulatory System
The Vocabulary terms in this lesson are:
 Circulatory system.
 Cardiovascular system.
 Pulmonary circulation.
 Systemic circulation.
 Arteries.
 Veins.
 Capillaries.
The Body’s Transport System
The circulatory system consists of organs
and tissues that transport essential
materials to body cells and remove their
waste products.
This body system is also known as the
cardiovascular system.
How the Circulatory System Works
C.Nutrients from
the digestive
system provide
food for the cells.
D.Germ fighters from
different parts of the
body help to fight
infection and disease.
Blood Flow
B.Oxygen from the
lungs combines
with nutrients to
provide energy.
A.Hormones
from glands
help regulate
cell activity.
E.Wastes are
carried to the
liver and
kidneys for
removal from
the body.
F. Carbon dioxide,
a waste gas, is
carried away
and delivered to
the lungs, which
remove it from
the body.
Parts of the Circulatory System
Your circulatory system includes your
heart, blood vessels, and blood. Your heart
pumps blood through two major pathways.
 Pulmonary circulation is the flow of blood from
the heart to the lungs and back to the heart.
 Systemic circulation is the flow of blood to all
the body tissues except the lungs.
The Circulatory System
Your heart is an
organ divided into
four chambers.
Each upper
chamber is called
an atrium, and
each lower
chamber is called
a ventricle.
Pulmonary veins
carry oxygen-rich
blood from your
lungs to your
heart.
Right atrium
Left atrium
Pulmonary
arteries carry
carbon dioxidefilled blood from
your heart to
your lungs.
Right ventricle
Left ventricle
Blood
Blood is a mixture of solids in a large
amount of liquid called plasma.
 Plasma transports blood solids, nutrients,
hormones, and other materials.
 Red blood cells carry oxygen to cells and
carbon dioxide away from them.
 White blood cells help fight disease and
infection.
 Platelets help blood form a clot at the site of a
wound.
Blood Vessels
Over 80,000 miles of blood vessels
transport your blood throughout your
body.
There are three types of blood vessels:
 Arteries
 Veins
 Capillaries
Blood Pressure
As blood is moved through your body, it
exerts pressure against the walls of blood
vessels.
 As your heart contracts to push blood into
your arteries, your blood pressure is at its
highest point. This is called systolic pressure.
 As your heart relaxes to refill, blood pressure
is at its lowest point. This is called diastolic
pressure.
Blood Types
There are four different blood types—A, B,
AB, and O. These blood types are
determined by the presence or absence of
certain substances.
Knowing a person’s blood type is essential
if the person needs a blood transfusion.
Mixing certain blood types can cause
dangerous immune responses such as
fevers, difficulty in breathing, and possibly
death.
Giving and Receiving Blood
People who are between the ages of 17
and 70 and in good health can give
blood.
The blood is frozen or refrigerated and
stored in blood banks for later use by
hospitals. U.S. regulations make it very
safe to give and receive blood.
Problems of the Circulatory System
Some of the problems of the circulatory
system include the following:
 Hypertension is a condition in which blood
pressure is consistently higher than normal,
which can lead to heart attack, stroke, or
kidney failure.
 Stroke usually results from blood clots that
block vessels in the brain, or from the rupture
of a blood vessel.
 Heart attack is blockage of the flow of blood
to the heart.
Care of the Circulatory System
Keeping your heart strong and healthy will
help you feel better now and may also
enable you to live a longer, healthier life.
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Limit fat in your foods.
Get regular physical activity.
Avoid tobacco.
Manage stress.
Reviewing Terms and Facts
Arteries are blood vessels that carry
1. _______
blood away from the heart to other
parts of the body.
Reviewing Terms and Facts
2. Identify the three solids that make up
blood.
 Red blood cells
 White blood
 Platelets
Thinking Critically
3. What are systemic circulation and
pulmonary circulation? Which one
carries newly oxygenated blood?
Pulmonary circulation is the flow of blood from
the heart to the lungs and back to the heart. It
carries newly oxygenated blood.
Systemic circulation is the flow of blood to all
the body tissues except the lungs.
Vocabulary Review
The circulatory system consists of organs
and tissues that transport essential
materials to body cells and remove their
waste products. This body system is also
known as the cardiovascular system.
Vocabulary Review
The circulatory system is also known as the
cardiovascular system.
Vocabulary Review
Pulmonary circulation is the flow of blood
from the heart to the lungs and back to the
heart.
Vocabulary Review
Systemic circulation is the flow of blood to
all the body tissues except the lungs.
Vocabulary Review
Arteries are blood vessels that carry blood
away from the heart to other parts of the
body.
Vocabulary Review
Veins are blood vessels that carry blood
from the body back to the heart.
Vocabulary Review
Capillaries are tiny tubes that carry blood
from the arteries to the body’s cells, and
then back to the veins.