Chapter #11
Circulation
Human Heart
Chapter 11.1 Notes
• Circulatory system- is made of your blood,
blood vessels, and heart.
• Blood delivers oxygen, H20 and food to
cells and picks up waste (carbon dioxide).
• Heart is the pump.
• Simple animals NO circulatory system
examples sponges, sea anemone, hydra
• Complex animals have circulatory systems
examples earthworms, insects, animals.
• Open circulatory system No blood vessels
travels without being in vessels. Insects.
• Closed circulatory system blood is inside
vessels. Humans and earthworms.
Chapter 11.2 Notes
• Atria-the small, top chambers of the heart.
• Ventricle- the large, bottom chambers.
Tricuspid valve
Bicuspid valve
• Beat each pump of the heart caused by
the valves closing.
• Blood only moves 1 way.
• Artery carries blood Away from heart.
• Vein carries blood to the heart.
• Valves are flaps in the heart that keep
blood flowing in 1 direction.
• Tricuspid valve between right atrium and
ventricle.
• Bicuspid valve between left atrium and
ventricle.
• Semilunar valves located between
ventricles and their arteries.
• Lub-dup sound caused from valves closing
lub= tricupid and bicuspid valves
dup=semiluar valves
• Heart murmur (swish) is caused from
blood flowing backward in the heart.
• Vena Cava largest vein in the body.
• Aorta largest artery in the body.
• Pulmonary artery carries blood away from
the heart and to the lungs.
• Pulmonary veins carry blood from the
lungs to the heart.
Path of blood in human heart
• Vena cava right atrium
right ventricle
pulmonary artery lungs pulmonary veins
left atrium left ventricle
aorta body
and head
vena cava
Chapter 11.3 Notes
• 96 000 kilometers of
blood vessels in the
human body. 2 ½
times around the
earth.
• Blood pressure is the
force created when
blood pushes against
the walls of vessels.
Arteries
1. Carries blood away from
the heart
2. Carries blood under high
pressure
3. Round in shape and
have thick muscular
walls.
Veins
1. Carry blood to the heart
2. Carry blood under low
pressure
3. Flat in shape and have
little muscle
4. Have valves to keep blood
flowing 1 way
• Capillaries are the
smallest kind of
blood vessels. 1 cell
thick. There are
more capillaries than
any other blood
vessels in the body.
Chapter 11.4 Notes
• Hypertension (High blood pressure ) occurs
when blood pressure is extremely high.
Caused by narrow arteries. Can cause
damage to body organs, heart failure, stroke
(broken blood vessel).
• Cholesterol is a fatlike chemical found in
foods. Causes plaque to form in blood
vessels.
• Coronary vessels
are the blood
vessels that carry
blood to and from
the heart. Carry
oxygen and
nutrients.
• Heart attack the
death of a section of
heart muscle.
•
Preventing heart
problems
1. Exercise
2. Proper diet
3. Do Not Smoke
•
Artificial heart is made of
plastic and metal. They
have been used for
people waiting for a
donor heart.
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“Circulatory System”. February 2, 2007.
http://www.scienceclarified.com/images/uesc_03_img0133.jpg
“Heart”. February 7, 2007. http://www.sciencebob.com/lab/bodyzone/heart.jpg
“Human Heart”. February 7, 2007.
http://upload.wikimedia.org/wikipedia/en/b/b7/Humhrt2.jpg
“Blood flow in Heart”. February 7, 2007.
http://www.wellesley.edu/Biology/Courses/111/ForOval.gif
“Human body with blood vessels”. February 8, 2007.
http://vascular.free.fr/logovassfond.gif
“Artery”. February 8, 2007. http://health.yahoo.com/media/healthwise/h5550977.jpg
“Vein”. February 8, 2007. http://www.merck.com/media/mmhe2/figures/fg036_3.gif
“Capillary”. February 8, 2007.
http://www.concord.org/~btinker/workbench_web/unitIV_revised/blood/capillary.jpeg
“High blood Pressure arteries”. February 9, 2007.
http://www.physicaltherapy.ca/cardio/Perm%20Images/h
ypertension.gif
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“Heart attack”. February 9, 2007.
http://www.medicinenet.com/images/illustrations/heart_attack.jpg
“Artificial Heart”. February 9, 2007. http://static.howstuffworks.com/gif/artificial-heartch.jpg