Download Pulmonary Circulation

The Circulatory System
The “Heart” of the Matter
What You’ll Learn
• How to compare arteries, veins, and capillaries
• The pathway of blood through the chambers of
the heart
• The pulmonary and systemic circulation
systems
The Purpose of the Cardiovascular
System
•
In our bodies, the cardiovascular system
distributes materials (blood, oxygen, remove
cell waste, and other nutrients) throughout our
body.
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The Heart
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The Heart
•
•
•
•
The major organ in the cardiovascular system. (pg. 547)
Made of cardiac muscle.
It is a closed system.
Composed of four cavities:
– Left and Right ATRIA (upper chambers)
– Left and Right VENTRICLES (lower chamber)
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“Pump It Up”
The
Pulmonary
Circulatory
Circulation
System
Systemic
Circulation
Coronary
Circulation
Pulmonary Circulation
(Heart Circulation)
Heart
Picks up O2
Lungs
Systemic Circulation
(Body Circulation)
Aorta
Body
•Blood enters the
Aorta and Aorta
carries blood away
from the heart
•O2 rich blood is
pumped to all organs
and tissues of body
(except heart &
lungs)
Veins
•O2 is exchanged
into CO2 & waste
and returns to
heart through the
veins
Coronary Circulation
(Heart Circulation)
• Heart has own blood vessels that supply it with
nutrients and O2
• Blockage of blood flow results in a heart attack.
Types of Blood Vessels
Arteries
Veins
Capillaries
•Move blood away
from heart
•Ventricles connect
to Aorta
•Contraction of
heart = blood
moved from heart
into arteries
•Move blood into
heart
•Valves keep blood
moving toward the
heart
•Near skeletal
muscles, squeezing
= contraction
=blood from heart
into arteries
•Connect arteries
and veins
•Walls are
microscopic
•“Blood Shot” eyes
•Waste and CO2
move into
capillaries to be
carried back to
heart
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Blood Pressure
• When the heart pumps blood through the
cardiovascular systems, it exerts a force called blood
pressure on the walls of the vessels.
•
arteries and
lower in capillaries and veins
• How it is measured: Systolic/Diastolic Pressure
Why It’s Important
• Plays a vital role as the transport system of the body.
• Failure of the cardiovascular system:
– Atherosclerosis
– Hypertension
• How to keep the heart healthy:
– Good diet
– Regular checkups
– Exercise
Atherosclerosis
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Cardiovascular Vocabulary
• Atria: Two upper chambers of the heart
• Ventricle: The two lower chambers of the heart
• Pulmonary Circulation: Flow of blood through the heart, to the lungs, and
back to the heart
• Systemic Circulation: Most extensive part of the circulatory system in which
blood moves to and from all body organs and tissues, except the heart and
lungs
• Coronary Circulation: Flow of blood to the tissues of the heart.
• Artery: Blood vessel with a thick elastic wall made from smooth muscle that
moves blood away from the heart
Cardiovascular Vocabulary
• Vein: Blood vessel that moves blood to the heart and has valves to prevent
backward movement of the blood
• Capillary: Microscopic blood vessel that connects arteries and veins;
nutrients, oxygen (O2), waste materials, and carbon dioxide (CO2) diffuse
through its walls
• Blood Pressure: force exerted on vessel walls by blood when the heart
pumps through the cardiovascular system; normally 120/80 for a young
adult
• Atherosclerosis: Cardiovascular condition resulting from fatty deposits on
arterial walls, which can clog blood vessels ad interfere with blood flow
• Hypertension: Cardiovascular disorder, also caused by high blood pressure,
that can cause atherosclerosis
Circulation Test Questions
1. Where does the exchange of food, oxygen, and wastes occur?
–
a. arteries
c. veins
–
b. capillaries
d. lymph vessels
2.
What are the lower chambers of the heart called?
–
a. Atrium
c. Ventricles
–
b. Aorta
d. Veins
3.
Contrast pulmonary and systemic circulation:
1.
________________ a cardiovascular disorder resulting from fatty
deposits on the arterial walls, which can clog blood vessels and
interfere with blood flow.
Answers to Circulation Test Questions
1. B – capillaries
2. C- ventricles
3. Pulmonary circulation transports blood through the heart and to the lungs.
Systemic circulation transports blood to all parts of the body.
4. Atherosclerosis
The End
• Power point created by: Ms. Walsh
• Chapter 20.1 Circulation