Transcript Organs and Organ Systems: Circulation

Organs and Organ
Systems:
Circulation
Unit #6
What is Circulation?
• The movement of
material in a definite
pattern.
Human Circulatory System
“Closed” System
• The movement of the
blood from the heart
through the body and
back to the heart again.
• Makes a continuous loop
Problems with being multicellular
• Transport needed
materials
• O2, food, H2O
• Transport waste
materials
• CO2, H2O
• Transport disease
fighting cells and
materials
How it works!!!
Inner Tube
Bulge
Here
Push
Here
Now add a one-way valve!!!
One-Way
Valve
Bulge
Here
Push
Here
Basic Circulation Needs
1. CHANGES IN PRESSURE
2. ONE-WAY VALVES
Human Heart
Size and Location
• size of your fist
• Located in the upper
chest cavity between the
lungs
• Slanted slightly to the
left
Chambers of the human heart
Atrium
• Two of them
• Located at top of heart
• Smaller chamber
• Receives blood
Ventricle
• Two of them
• Located at bottom of
heart
• Larger muscular
chamber
• Pushes blood out
Pulmonary Circulation (lungs)
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Superior and Inferior Vena Cava
Right Atrium
Tricuspid Valve
Right Ventricle
Semi-Lunar Valve
Pulmonary Artery
LUNGS  blood needs to pick O2 and get rid of CO2
This blood is DEOXYGENATED – has delivered O2 to the cells
Systemic Circulation (body cells)
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Pulmonary Veins
Left Atrium
Bicuspid Valve
Left Ventricle
Semi-Lunar Valve
Aorta
CELLS
• This blood is OXYGENATED – picked up O2 up in the lungs
Anatomy of Heart Coloring Pages
Color By Letter Pages
You Pick Colors
EXCEPT:
Oxygen Poor – Blue
Oxygen Rich - Red
MEASUREMENTS OF THE CIRCULATORY SYSTEM
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3. Heart murmurs.
B. PULSE
Pulse is caused by the regular stretching and relaxing of the arteries when the blood
spurts through them.
2. Each time the heart pushes blood out the blood spurts into the arteries.
3. The pulse can be felt wherever the arteries are close to the skin.
4. Pulse points are: wrist, temples, armpits, ankles, inside thigh, neck.
5. PULSE RATE = HEARTBEAT RATE
C. BLOOD PRESSURE
As the heart beats, the blood surges against the artery walls. A measure of this force
is called blood pressure.
Blood pressure is not a constant pressure. The pressure is great when the ventricles
are pushes on the blood; thepressure is less when the ventricles are relaxed.
3. NORMAL BLOOD PRESSURE = 115/80
4. HYPERTENSION - high blood pressure
HEARTBEAT
Heartbeat is the "lub-DUB" sound made by the closing of the
valves of the heart. lub - closing of tricuspid and bicuspid
valves.
DUB - closing of the semilunar valves. ONE BEAT = ONE lub-DUP
Things that make the heart
beat faster
• activity, caffeine, smaller body size, less physically fit, etc...
Things that make the heart
beat slower
• Heartbeat is slower if: less activity, larger body size, better
physical fitness.