Download Heart * Chapter 4 - Mahtomedi Middle School

I
the heart
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Close your eyes and listen closely…
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https://www.youtube.com/watch?v=gJpT_wHZeF8
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What is making the sound that you hear??
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Page 104 AND Heart coloring WS out…
please…we are going to label those valves in
your book now…
4 of them:
Tricuspid
Mitral
Pulmonary
Aortic
Pulmonary
Valve
Mitral
Valve
Tricuspid
valve
Aortic Valve
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Shafer/Lindahl: Insert The Visible Heart disk
from Medtronic
Valves opening and closing, making noise if
they had a microphone in there!
• Which
chamber is
the
BIGGEST?
• Look at the
walls…which
chamber has
the thickest
walls?
• Answer Q2
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How do you think the contraction of the chambers
takes place? Ex – left side then right? Whole heart at
once?...talk with your pod about your ideas.
Now…watch this:
http://www.fastcocreate.com/3055916/gif-of-theday/this-clever-gif-turns-street-art-into-a-beating-heart
What do you think now?
Watch this cool clip:
https://www.youtube.com/watch?v=y5maHDAkzUs
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1.
2.
3.
4.
5.
6.
Write the steps involved in a contraction in the
table on pg. 105
Heart muscle relaxes, atria fills with blood
The atria contract
Blood goes into ventricles
Ventricles contract
Mitral and Tricuspid valves shut, blood goes
into vessels
Pulmonary & aortic valves shut
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Artificial valves…they sound different, listen
closely and see a variety in this short clip (it is
# 6 in the list and turn up the sound more!!:
https://www.youtube.com/watch?v=BI5W45
By8OI&list=PLB_2jnSX2wuYHWahfWMd85KT
bEoykoD8w&index=7
Aneurysm –
an abnormal
blood-filled
bulge of a
blood vessel
resulting in the
weakening
of the vessel wall
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Natural pacemaker: a group of cells that cause
the contraction of the heart muscle. IT’S
ELECTRIC!!
An okay clip about it:
https://www.youtube.com/watch?v=II5RPs1
hlGI
Artificial Pacemakers:
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https://www.youtube.com/watch?v=oHMmtqKgs50
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Page 108 page 108 page 108:
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What’s the Difference between Arteries and
Veins?? - direction? - color?
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What is a capillary?
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Cardiac Cycle – the loop
L. Lindahl
Mahtomedi Public Schools ISD 832
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We will review the Cardiac Cycle
Identify where a drop of blood flows beginning
with the Vena Cava
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There are two of them: Superior
and Inferior
Very large and roomy blood
vessel
Where will you go next?
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You just entered one of the __________ chambers of
the heart.
You are separated from the rest of the chambers by a
prevent blood
from flowing backwards!!
valve. Valves help to:
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This is the largest ventricle
As you enter it you pass through
the
valve.
This valve has
If you squeeze the heart, this
ventricle will feel squishier
The _____________ is the muscle
that runs up and down in the
center of the heart.
Where will you go next?
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As you enter the P.A. you go
through the
valve.
The pulmonary artery is filled with
BLUE blood.
This blood is low in oxygen and
high in
___________________________.
Now you will go to the all
important organ: _____________.
(both the left and right lung)
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You enter the lungs and here
you get rid of your
and replenished with
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This happens because of a
process called
What is diffusion??:
__________________________________________
___________________ surround the air sacs in the
lungs and are very thin. They connect the arteries
to the veins.
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You come back to the heart
through the pulmonary veins
(from the left and right lung).
This is high in oxygen, the
only RED vein you will be in.
From here you will enter the
_________________________
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From here you go through a valve called the
Then you will be pumped into the ___________
_________.
• This is the smaller ventricle with
the
.
• Why so much muscle?
•Then you go to the
so you can be pumped out to
the body!
• See how it comes behind the heart
to go downward. This is so it can
bring blood to your lower body (like
your pinky toe).
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VENA CAVA
RIGHT ATRIUM
TRICUSPID VALVE
RIGHT VENTRICLE
PULMONARY VALVE
PULMONARY ARTERY
LUNGS
PULMONARY VEINS
LEFT ATRIUM
MITRAL VALVE
LEFT VENTRICLE
AORTIC VALVE
AORTA TO THE REST OF THE BODY!!