Transcript Circulatory System

Story
 In the middle of the night, a truck rolls rapidly
through the darkness. Loaded with fresh fruits and
vegetables, the truck is headed for the super market.
The driver steers off the interstate and onto a smaller
highway. Finally, after driving through narrow city
streets, the truck reaches its destination. As dawn
begins to break, store workers unload the cargo. They
work quickly because other trucks-
Story Cont.
 Carrying meats, canned goods and freshly bakes
breads- are waiting to be unloaded. And while
workers fill the store with products to be sold, a
garbage truck removes yesterday's trash. All these
trucks have traveled long distances over roads.
Without a huge network of roads, big and small, the
supermarket’s couldn’t stay in business.
Movement of Materials
roads
 Like the _______that
link all the parts of the country,
highway
your body has a “___________”
network, called the
circulatory
___________system.
heart
vessels
 This consists of the________,
blood________,
blood
and__________.
The circulatory system carries
_________substances
to _______and
carries
needed
cells
________products
away from cells.
waste
Blood
fight
 ________also
contains cells that ________disease
Needed Materials
from
 Substances that need to get _______one
part of the
body to _________are
carried by________.
another
blood
 Ex. Blood carries oxygen from your lungs to your body.
Waste Products
 The circulatory system also ________up
picks
________products
from_______.
waste
cells
 Ex. When cells use glucose (sugar), they produce carbon
dioxide as a waste product. The carbon dioxide passes
from the cells into the blood. The circulatory system
then carries the carbon dioxide to the lungs, where it is
exhaled.
Disease Fighters
 The circulatory system also __________cells
that
transports
attack ____________causing
microorganisms.
disease
sick
 This helps keep you from getting_______.
 If you do get sick, these disease fighting blood cells will
kill the microorganisms to help you get well.
Heart
muscular
pumps
 Hollow ____________organ
that ________blood





throughout the body
Made of __________muscle
cardiac
About the size of your_________
fist
center
Located in ________of
chest, behind breastbone,
inside the ribs
Each time the heart_______,
beats it pushes
_________through
blood vessels
blood
During your lifetime, your heart may beat over 3
billion
__________times,
and pump enough blood to fill over
30
_____competition
size swimming pools
Heart
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Heart’s Structure
 Heart has ______sides—_______________
two
Right and Left
chambers Each side has ______compartments
or _________
two
upper and lower
 Upper chambers are called _________or
atria
Atrium
 The atrium receives blood that comes INTO the heart.
 Lower chambers are called___________
Ventricles
 Ventricles pump blood OUT of the heart
 The atria are ____________from
the ventricles
separated
by_______
valves
 Valves are flaps of tissue that prevents blood from
flowing backward
Hearts Structure
Pacemaker
 _____________:
Group of cells in right
_______atrium that
regulates the ________of
the heart.
beating
Right
receives
 ________atrium:
__________blood
from body.
Low
high
______in
oxygen, ________in
waste (carbon dioxide).
ventricle during contraction, pumps oxygen
 Right _________:
_________blood
to the_________
poor
lungs
Heart’s Structure
Atrium
 Left __________:
oxygen _______blood
moves the
rich
lungs to here during relaxation.
all
 Left ventricle: pumps oxygen rich blood to ______parts
of body.
 Septum: muscular _______that
separates heart from
wall
right to left sides.
largest
 Aorta: _________blood
vessel in the body. Carries
left
blood from ______ventricle
to the body.
 https://human.biodigital.com/index.html
Heart
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STOP
How the Heart Works
 Your heart goes through two
______main phases
fills
 Relaxation (muscle): when the heart _____with
blood
 Contraction (muscle): pumps
_______blood forward

When the heart muscle relaxes, blood flows into the
chambers, the atria contract, sending blood through valves
into the ventricles. Next the ventricles contract squeezing
blood out to the body.
 This ALL happens in less than a second!
Regulation of Heartbeat
 The ___________sends
out __________that
makes the
pacemaker
signals
heart muscle contract.
constantly
 The pacemaker ____________receives
messages about
adjusts
the body’s oxygen needs and __________the
heart rate
to match.
 Ex. heart beats much faster when exercising versus
sitting due to body needing more oxygen
Blood Vessels
three
 Your body has ________kinds
of blood vessels.
oxygenated
 Arteries: carries _____________blood
away from the
heart

From the arteries, blood flows into capillaries
 Capillaries: tiny vessels (one cell thick) where
exchanged
substances are _____________between
the blood and
body cells
Oxygen, glucose one way (arteries). waste the other (veins)
From capillaries, blood flows into veins


 _________:
vessels that carry ______________blood
back
Veins
deoxygenated
to heart
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Brainpops
 http://www.brainpop.com/health/bodysystems/circul
atorysystem/
Fact
 If you lightly touch the inside of your wrist, or the side
of your throat, you can feel the artery rise and fall
repeatedly---this is your pulse.
atherosclerosis
 atherosclerosis is a buildup of fatty deposits within
the walls of arteries. Sclerosis refers to hardening of a
tissue.
 sometimes encounter a similar word, arteriosclerosis,
which means literally "hardening of the arteries."
Some hardening of the arteries often occurs naturally
with aging, but it can be made worse by the
accumulation of various kinds of deposits, including
calcium.
Atherosclerosis
 Atherosclerosis, like arteriosclerosis, causes arteries to
lose their flexibility. Explain that atherosclerosis is a
specific form of arteriosclerosis, and it is the term that
is nearly always used in relation to the cause of most
heart attacks and strokes.
Discussion Questions
 What does the circulatory system do?
 It carries food, water, oxygen, and other important
materials to cells and tissues throughout the body; it
also carries away wastes produced by all the other
chemical reactions that take place inside cells.
 What does the heart do?
 It pumps blood through the circulatory system.
 How do the heart and the blood vessels work together?
 The heart pumps blood; the vessels carry blood.
Discussion Questions
 What does coronary circulation do?
 Coronary circulation supplies oxygen-rich blood to all
the cells of the heart.
 How do the circulatory system and the respiratory
system work together to maintain homeostasis?
 The circulatory system delivers oxygen from the
respiratory system to other parts of the body and
transports waste products (carbon dioxide) from the
other parts of the body to the respiratory system for
removal from the body.
Blood
four
 Made of ________components:
red blood cells (RBC),
white blood cells (WBC), plasma, platelets.
up
lungs
 Red blood cells: picks ____oxygen
from _________and
takes to rest of body
 Produced in bone marrow
http://goo.gl/X9XPlf
Blood
bone
 White blood cells: produced in ________marrow.
 Your bodies ________fighter
disease
 Less WBC--One WBC to every 500-1000 RBC
http://goo.gl/H0FcmE
Plasma
 Where have you heard this word?
 plasma TVs, plasma used in transfusions, plasma
membrane used instead of cell membrane, or other
scientific uses.

the plasma used in a plasma TV refers to a fourth state of
matter that contains a huge number of electrically charged
particles. It is another form of a gas.
 Do you think the kind of plasma in a TV is the same as
the plasma in blood?
 No, the plasma in blood is a liquid.
Blood
 Plasma: Most of the material ______________travels
transported
on plasma.
 _____________in
color
Yellowish

due to protein molecules
http://goo.gl/Z9ETIu
Blood
 Platelets: play important part in ____________blood
forming
clots.
 Ex. When you cut your finger
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Brainpop
 http://www.brainpop.com/health/bodysystems/blood
/
Discussion Questions
 What does the blood do?
 Blood transports substances (oxygen, carbon dioxide,
nutrients, hormones, waste materials); fights infection
and helps heal wounds; and helps regulate body
temperature.
 How do the parts of blood differ?
 Answers should reflect an understanding that the
different parts of blood have different roles, have
different shapes, and are present in different amounts.
Plasma is the liquid part of blood that transports the
other parts.
Discussion Questions
 What kinds of antigens are found in AB+ blood?
 A, B, and Rh antigens are found in AB+ blood.
Bill Nye
 http://www.youtube.com/watch?v=GbttJ-5do9M
 http://www.youtube.com/watch?v=RiYOuI7iyp8
 http://www.youtube.com/watch?v=YlCX2NCEgcM
 http://www.youtube.com/watch?v=mDSFxcf2UgQ