The Circulatory System
• is the main cooling and
transportation system for the
human body
• has about 5 liters of blood
continuously traveling through it
• Is composed of the heart,
lungs, and blood vessels
has three different parts:
1. pulmonary circulation (lungs)
2. coronary circulation (heart)
3. systemic circulation, (the rest
of the system’s processes).
The Heart
This organ pumps oxygen &
nutrient rich blood to the
cells in your body.
The blood then picks up
waste & carbon dioxide from
those same cells and brings
it back to the heart.
By The Way…
Whenever the blood is pumped from
one section of the heart another a
valve closes behind it preventing the
blood from moving backwards.
Blood
• Complex mixture of cells, water, and
various proteins and sugars.
• Fifty-five percent is plasma (liquid).
• Forty-five percent is solid (cells).
– Red Blood Cells
• Have a protein called hemoglobin that
carries oxygen
– White Blood Cells
• Fight infection
– Platelets
• Aid in blood clotting
Blood Flow to & from the Legs
FUN FACTS!
• Approximately 500 ml of blood
moves from the heart and lungs
down to the legs when a person
stands up after lying down
• Let’s talk about your
hands/feet/legs etc falling
asleep…
• Let’s also talk about why you
get dizzy if you stand up too
fast…
Blood Flow through Heart
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Blood from the body travels into the
right atrium (a holding tank for
blood), moves into the right ventricle
(a chamber that pumps blood), and is
finally pushed into lungs in the
pulmonary arteries
The blood then picks up oxygen and
travels back to the heart into the left
atrium through the pulmonary veins
The blood then travels through the to
the Left Ventricle and exits to the
body through the Aorta…
Left Atrium
Right Atrium
Blood Flow to Arms
• Oxygen rich blood leaves
the heart and travels through
arteries (move blood
AWAY from the heart)
• In the capillaries the oxygen
and food diffuses into cells
& the waste & carbon
dioxide diffuses from the
cells back to the capillaries.
• The blood finally travels
back through veins (carry
blood back to the heart) to
the heart to pick up oxygen
ARTERIES- FROM HEART
CAPILLARIES
VEINS- TO HEART
Path to the Exchange
Pulmonary Vein
Aorta
Brachial Artery
Renal Artery
Redial Artery
Ulnar Artery
Iliac Artery
A red blood cell
then travels
from the heart
through arteries
that eventually
branch into the
body’s vast
system of
capillaries
(microscopic
blood vessels
which connect
arteries and
veins), they
eventually lead
to…
Circulation back to Heart
To upper body
From upper
body
To lung
To lung
From lung
From
lung
Right
Atrium
Left
Atrium
Right
Ventricle
Left
Ventricle
From lower
body
To lower body
• Capillaries carry the blood to
• Venules that connect to
• Veins (wide blood vessels) carry
the oxygen-poor blood back to
the heart. This blood is NOT
blue, it is NEVER EVER EVER
BLUE!
Summary
Structures
Heart
Lungs
Arteries
Veins
Capillaries
Function
To pump oxygenated
blood & nutrients to
the cells and return
deoxygenated blood
and waste to the
heart.
Works Cited
For further information please visit:
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http://www.carolguze.com/images/organsystems/circulatory2.jpg -circulation picture
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/Circulation2.html -how circulatory system
works
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http://www.medical-art-service.de/assets/images/3_KA_704.jpg -Heart and Leg Pictures
http://www.ama-assn.org/ama1/pub/upload/images/446/circulationgeneral.gif -circulation picture
http://eduserv.hscer.washington.edu/hubio553/atlas/232.html -arm picture
http://adam.about.com/encyclopedia/19387.html -heart picture
http://www.tmc.edu/thi/anatomy1.html -detailed views of the Cardiovascular System
http://www.tmc.edu/thi/leg.jpg -complex leg picture
http://www.med.umich.edu/1libr/wha/circ.gif- diagram of the circulatory system
http://images.google.co.id/imgres?imgurl=http://www4.tpgi.com.au/users/amcgann/body/circulatory/bod
y_circulation.jpg&imgrefurl=http://www4.tpgi.com.au/users/amcgann/body/circulatory.html&h=369&w
=300&sz=23&tbnid=rSdZ_CMJpBYJ:&tbnh=117&tbnw=95&start=123&prev=/images%3Fq%3Dcircul
atory%2Bsystem%26start%3D120%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3D -picture of
heart valves
http://eduserv.hscer.washington.edu/hubio553/atlas/232.html -basic picture of arteries