Transcript Circulatory System

What is this about?
Trivia Question
What is the strongest muscle in the body?
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Answer
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Blood Flow
Heart
Lungs
Arteries
Veins
Capillaries
Pulmonary Circulation
Heart
Location of heart….
Heart
Purpose: To pump oxygenated
blood out to the body so that the
body can carry out its daily
functions and work properly.
Four Chambers of the Heart
 Upper Two Chambers: Left and right atriums
 Lower Two Chambers: Left and right ventricles
 Draw picture of the four squares….
Lungs
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Healthy Lungs
Lungs of a Smoker
 On left,
Emphysema
 On right,
Lung Cancer
Healthy Lungs vs. Smokers
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Lungs
Purpose: Takes in non-oxygenated
blood and oxygenates that blood. It
then sends that oxygenated blood
back to the heart to be pumped out
to the body for use.
Arteries
Blood Pressure…. High and Low
(Dehydration, severe bleeding etc.)
Arteries
Arteries = “Away”
Arteries: blood vessels that carry
blood away from the heart.
Veins
Veins
Veins = “Towards you”
Veins: blood vessels that carry
blood from the body back to the
heart.
Capillaries
 Tiny blood vessels that
carry blood from the
arteries to the body’s
cells and from cells to
the veins.
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Pulmonary Arteries
Carry blood containing carbon
dioxide (non-oxygenated blood)
from your heart to your lungs.
Pulmonary Veins
Carry blood containing oxygenated
blood from your lungs to your
heart.
Pulmonary Circulation
Definition: the flow of blood from
the heart to the lungs and back to
the heart.
(Whiteboard Drawing of stickman,
lungs and heart)
Flow of Blood Through Heart
Blood flows to the heart
through the Superior and
Inferior Vena Cava, into
the RIGHT ATRIUM, then
drops into the RIGHT
VENTRICLE. Blood is
then pumped to the lungs
through the PULMONARY
ARTERY. From the lungs, the
blood returns to the heart through
the PULMONARY VEIN. Blood
flows into the LEFT ATRIUM, then
drops down to the LEFT
VENTRICLE. From the left
ventricle the blood is pumped
to the body through the AORTA.
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Valves
 A tissue that prevents the back flow of blood into the
heart
 They open and close to
let the blood flow in only
one direction.
 **** Think of them like
a traffic cop….
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Liver and Kidneys
 Wastes from your blood
are carried to these for
removal from your body.
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Trivia Question
How far would all your blood
vessels stretched out be?
(Arteries, veins, and capillaries)
Answer:
100,000 miles!!!
That’s enough to circle the Earth four times!!
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Trivia Question
How many times does your blood
cycle through your own body in
one day?
Answer
*1,000 cycles in one day!!
*Roughly 100,000
heartbeats in one day.
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Diseases/Disorders
 Hypertension: Blood pressure
higher than normal for a long
time
 Can lead to a heart attack,
stroke, and kidney failure.
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Diseases/Disorders
 Heart Attack: Stoppage of flow of blood to the heart.
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Diseases/Disorders
 Stroke: Cluster of blood
cells (blood clot) blocks
blood vessel in brain.
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Diseases/Disorders
 Diabetes: The body does not produce enough insulin
that allows glucose (food broken down) into the cells.
So, even though the blood has plenty of glucose, the
cells are not getting it for their essential energy and
growth requirements because of the lack of insulin.
 Insulin helps with glucose transport (getting energy out
to the body)
Diabetes
 Type I: a disorder in which the body does not produce insulin (a
hormone that aids in moving sugar from the blood to the cells).
Those with Type I Diabetes are required to take insulin injections
to move sugar from the bloodstream. (Usually you are born with
Type I).
 Type II: occurs when insulin that the body produces is less
efficient at moving sugar out of the bloodstream. Usually caused
from obesity. Those with Type II treat with exercise, eating
healthier, weight loss.
Diabetes (cont’d)
 When glucose builds up
in the bloodstream, it can
cause two problems:
 in the short term, cells
become starved for energy
because they do not have
access to the glucose
 in the long term, frequent
glucose build-up increases the
acidity of the blood, damaging
many of the body's organs,
including the eyes, kidneys,
nerves and/or heart
Trivia Question
What is the #1 cause of death in
America?
Diseases/Disorders
 Cardiovascular Disease: The build up of plaque in
the arteries that causes a stop of blood flow resulting
in a stroke or heart attack.
 THE #1 cause of death in America.
 Primary cause of cardiovascular disease = Not exercising
enough!!!
 What can you argue is the most important class of your
life???….
Blood Pressure
Diastolic
Systolic
Normal BP is 115/75
(Systolic/Diastolic)
Diastolic Pressure
Minimum pressure in
arteries; occurs at the
beginning of the cardiac
cycle when the ventricles are
relaxing (filling up with
blood).
Systolic Pressure
Peak pressure in the arteries;
occurs near the end of the
cardiac cycle when the
ventricles are contracting
Questions?