Transcript Heart and Lung Model Notes

What does the heart do?
• Part A: Write down some thoughts
• 1) pumps
blood to the body
• 2) collects blood that goes through a
series of systems, and then goes all
throughout the body.
• 3) keeps the body alive, because our
body needs nutrients—consistently
have blood pumping.
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What does the heart do?
• Part A: Write down some thoughts
• The heart pumps blood into your
veins,
• Regulates your blood throughout the
body,
• Keeps body stable and ready to function,
• Pumping non stop, helps to maintain
homeostasis, transports nutrients
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Draw the path of blood between the heart and
body.
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Draw the path of blood between the heart and
body.
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I WORK OUT!!!! Homeostasis Lab
Period 5:
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I WORK OUT!!!! Homeostasis Lab
Period 6:
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From your coloring on Friday:
• In section E on the heart doodle sheet:
• Describe what the right side of the heart
does.
• Describe what the left side of the heart
does.
• Why does the heart needs valves?
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The flow of the blood:
Systemic (Body)
Pulmonary
(Lungs)
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Draw the path of blood between the heart and
body.
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Draw the path of blood between the heart and
body.
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What is the main job then of the circulatory
system? Left side on the heart coloring paper
• Main job: Circulate blood throughout entire
body for
Transport of oxygen to cells
Transport of CO2 away from cells
Transport of nutrients (glucose) to cells
Movement of immune system components (cells,
antibodies)
Transport of endocrine gland secretions
http://www.youtube.com/watch?v=JA0Wb3gc4mE
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What are the parts of the circulatory system?
Write this in part E
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What are the parts of the circulatory
system? Write this in part E
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What are the Parts?
• Heart
• Blood Vessels
Arteries Away from Heart
Veins to Heart
Diffusion happens in capillaries (oxygen, CO2,
glucose diffuse in or out of blood)
• Blood
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Types of Blood Vessels
•
•
•
Arteries
-Carry blood away from the Heart
-The Aorta is the largest artery
Veins
-Carry blood to the Heart
-Veins contain valves
-The Vena Cava is the largest vein
Capillaries
-Known as the “Distribution Pipes”
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What is blood composed of?
• Red Blood Cells
-Carry oxygen/carbon dioxide
-Contain Hemoglobin-a protein used to help
keep oxygen/carbon dioxide in the red blood
cells.
• White Blood Cells
-Attack bacteria & other invaders
• Platelets
-Control the blood clotting process
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Heart Chambers and Valves
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Putting it together, left side below heart coloring:
• Describe how exercise will cause the heart
to pump faster. Where does the blood go,
how does it work through the body, and
where does it end up to get the nutrients
needed?
• Words needed: arteries, veins, right side
of the heart, left side of the heart, oxygen,
carbon dioxide, red blood cells.
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So what organs are involved in homeostasis?
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Structure of the lungs
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Gas exchange in the alveoli
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• http://highered.mcgrawhill.com/sites/0035456775/student_view0/
chapter35/movement_of_oxygen_and_car
bon_dioxide.html
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Artery/Vein differences
Arteries
Veins
Direction of Blood Away from Blood to Heart
flow
Heart
Pressure
Higher
Lower
Walls
Thicker
Thinner
Lumen
(diameter)
Valves
Smaller
Larger
No valves
Valves (see next)
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Capillaries
• Microscopic--one cell
layer thick
• Network
• Entire goal of C-V
system is to get blood
into capillaries where
diffusion takes place
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Hepatic Portal System
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Blood Plasma
• 97% Water
• Other 3%
-Antibodies and Proteins
- Nutrients and Wastes
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How the blood maintains homeostasis
• Carries Oxygen out of the heart, Carbon Dioxide
back to the heart.
• Has to have a specific pH of 7.35-7.45
• What is pH? What does too much Carbon
Dioxide do?
• Acid range:
• Base range:
• Neutral range:
• Blood range:
• What happens when Carbon Dioxide builds up?
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pH Scale
• We use this scale to measure the
concentration of an acid or base.
• pH is defined as the –log[H+]
• pH can use the concentration of
hydronium ions or hydrogen ions.
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pH of Common Substances
Average Blood pH = 7.4
Timberlake, Chemistry 7th Edition, page 335
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By-product of respiration
CO2 + H2O ↔ H2CO3 ↔ HCO3- + H + ↔ CO32- + 2H+
carbonic acid
bicarbonate
carbonate
The addition of CO2 makes blood acidic
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Like exercise!
The pH of the blood,
Making it too acidic!
Receive the info,
that the pH is too
low
Your nervous system
Your brain
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Your brain sends
a message to
the diaphragm
When the pH returns
to normal,
homeostasis is
restored!
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How does this exchange in the alveoli maintain
homeostasis?
• Decide with your partner why this is
important to homeostasis and write this in
on your homeostasis side of your notes.
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So the respiratory system’s main function is:
• Talk with your partner, look back over your
notes and decide what the respiratory’s
main function is.
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Structures of the human lung
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Keeping the airways clear
The walls of the trachea
and bronchus contain
goblet cells, which
secrete mucus made of
mucin. This traps microorganisms and debris,
helping to keep the
airways clear.
The walls also contain ciliated epithelial cells, which are
covered on one surface with cilia. These beat regularly to
move microorganisms and dust particles along with the
mucus. They contain many mitochondria to provide
energy for the beating cilia.
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