Upload
elmer-maxwell
View
213
Download
0
Embed Size (px)
Citation preview
Circulatory System
StoryIn 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 MaterialsLike the _______that link all the parts of the
country, your body has a “___________” network, called the ___________system.
This consists of the________, blood________, and__________. The circulatory system carries _________substances to _______and carries ________products away from cells.
________also contains cells that ________disease
roadshighwaycirculator
y heart vesselsblood
needed cells
waste
fight Blood
Needed MaterialsSubstances that need to get _______one part
of the body to _________are carried by________.Ex. Blood carries oxygen from your lungs to
your body.
from another blood
Waste ProductsThe circulatory system also ________up
________products from_______.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.
picks
waste cells
Disease FightersThe circulatory system also __________cells
that attack ____________causing microorganisms.
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.
transports diseas
e sick
HeartHollow ____________organ that ________blood
throughout the bodyMade of __________muscleAbout the size of your_________Located in ________of chest, behind
breastbone, inside the ribsEach time the heart_______, it pushes
_________through blood vesselsDuring your lifetime, your heart may beat over
3 __________times, and pump enough blood to fill over _____competition size swimming pools
muscular
pumps
cardiac fist
center
beatsblood
billion
30
Heart
Heart’s StructureHeart has ______sides—_______________Each side has ______compartments or _________
upper and lowerUpper chambers are called _________or atria
The atrium receives blood that comes INTO the heart.
Lower chambers are called___________Ventricles pump blood OUT of the heart
The atria are ____________from the ventricles by_______Valves are flaps of tissue that prevents blood from
flowing backward
two Right and Lefttwo chamber
s-
Atrium
Ventricles
separated valves
Hearts Structure_____________: Group of cells in _______atrium
that regulates the ________of the heart.________atrium: __________blood from body.
______in oxygen, ________in waste (carbon dioxide).
Right _________: during contraction, pumps oxygen _________blood to the_________
right
beating
Pacemaker
Right receives Low high ventricl
epoor lungs
Heart’s StructureLeft __________: oxygen _______blood moves
the lungs to here during relaxation.Left ventricle: pumps oxygen rich blood to
______parts of body.Septum: muscular _______that separates
heart from right to left sides.Aorta: _________blood vessel in the body.
Carries blood from ______ventricle to the body.
Atrium
rich
all
wall
largest left
Heart
STOP
How the Heart WorksYour heart goes through ______main phases
Relaxation (muscle): when the heart _____with blood
Contraction (muscle): _______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.
two
fills
pumps
This ALL happens in less than a second!
Regulation of HeartbeatThe ___________sends out __________that
makes the heart muscle contract.The pacemaker ____________receives
messages about 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
pacemaker
signals
constantly adjust
s
Blood VesselsYour body has ________kinds of blood vessels.
Arteries: carries _____________blood away from the heart From the arteries, blood flows into capillaries
Capillaries: tiny vessels (one cell thick) where 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 to heart
three oxygenate
d
exchanged
Veins deoxygenated
FactIf 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.
BloodMade of ________components: red blood cells
(RBC), white blood cells (WBC), plasma, platelets.
Red blood cells: picks ____oxygen from _________and takes to rest of bodyProduced in bone marrow
four
up lungs
BloodWhite blood cells: produced in
________marrow.Your bodies ________fighterLess WBC--One WBC to every 500-1000 RBC
bone
disease
BloodPlasma: Most of the material
______________travels on plasma._____________in color
due to protein molecules
transported
Yellowish
BloodPlatelets: play important part in
____________blood clots.Ex. When you cut your finger
forming
Blood Video