1. CIRCULATORY
SYSTEM

2. • Materials are moved throughout your body by the
cardiovascular system
– This system includes your heart, blood vessels,
and blood

3. • The heart is the organ that continuously circulates
blood throughout the body.

4. • Blood vessels carry blood to every part of the
body
• Blood moves oxygen and nutrients to cells, and
carries wastes away from the cells

5. • The heart is made of cardiac muscle tissue
• The heart has four compartments called chambers
• The upper chambers are the right and left atriums
• The lower chambers are called ventricles

6. • Blood flows in only one direction, from an atrium
to a ventricle, then from a ventricle to a blood
vessel

7. • There are three types of circulation:
– Coronary circulation
– Pulmonary circulation
– Systemic circulation
• The beating of your heart controls blood flow for
all of them

9. • Coronary circulation is the flow of blood to and
from tissues of the heart (takes place within the
heart)
• Pulmonary circulation is the flow of blood through
the heart to the lungs and back to the heart
• In systemic circulation, oxygen-rich blood moves to
all organs and body tissues (except the heart and
lungs)
– Systemic circulation is the largest of the three
sections of the circulatory system

10. • Systemic circulation relies on blood vessels called
arteries and veins to carry blood to organs
• Arteries carry blood away from the heart
– Each ventricle of the heart is connected to an
artery
– The right ventricle is connected to the
pulmonary artery
– The left ventricle is attached to the aorta, the
largest artery in the body

12. • Veins carry blood back to the heart
- Veins have one-way valves that keep blood
moving toward the heart
• Arteries and veins are
connected by microscopic
blood vessels called
capillaries

13. • Blood pressure is what we call the force of blood on
the walls of blood vessels

14. • Blood pressure is expressed by two numbers,
called the systolic pressure and the diastolic
pressure
“normal” blood pressure is
120 over 80

15. • Cardiovascular disease is the leading cause of
death in the U.S.
– Diseases that affect the cardiovascular system
affect the health of the whole body

16. • Atherosclerosis is a condition in which fatty
deposits build up on artery walls

17. • Hypertension is high blood pressure. This places
extra strain on the heart
• Heart failure results when the heart cannot pump
blood efficiently

18. • Most cardiovascular
disease can be
prevented
by having a healthy
lifestyle, including
healthy eating habits,
exercise,
and getting
enough sleep