Transcript Blood Vessels - Teacher Pages

Blood Vessels
To be used with Circulatory System Guided
Notes
Gaccione/Bakka
Belleville High School
Blood vessels - Arteries
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Thick walled & very muscular.
Carries oxygenated blood away from the heart.
Under great pressure.
Blood pressure (120/80)
Pulse rate (70 per minute)is taken from the arteries.
Aorta - largest artery
Blood vessels - Veins
1. Thin walled & flaccid.
2. Under low pressure.
3. Contains one way valve
that prevent backflow of
blood.
4. Problem: If you remain
inactive for too long, blood
may pool in your feet and
lower legs, which may result
in swollen feet & ankles.
Also can led to varicose veins.
• Varicose veins affect 1 out of 2
people age 50 and older, and
15 to 25% of all adults.
• Symptoms
enlarged veins
swollen feet & ankles
pain - “heavy legs”
dry skin & ulcers
Treatment
Self awareness
• Avoid excess amounts of standing
• Elevate legs
• Wear compression stockings
• Exercise - improves muscle tone
• Lose weight
Treatment
• Surgical Treatment
Remove, tie up or close
This does not create a problem - the blood
reroutes itself through other veins.
• Laser Treatment
Dissolves or closes veins
• New treatment
Uses a diode laser that re-energizes the inner wall
of the vein.
Veins (continued)
1. One way valves prevents back flow of blood.
2. Lack of oxygen gives veins its blue color.
Blood vessels - Capillaries
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Located where arteries end and veins begin.
Microscopic and walls are only one cell thick.
Form a dense network that reaches every
body cell.
Thin capillary walls enable nutrients & gases
to diffuse into all body cells.
Capillaries in the Lungs
• Found where arteries end
and veins begins.
• Surrounds aveolus/aveoli
(air sacs in the lungs).
• Exchanges oxygen for
carbon dioxide.
Capillaries throughout the body
• Found between arteries and veins.
• Delivers oxygen to all body cells and removes
carbon dioxide (waste) from all body cells. The
process that produces carbon dioxide is called
cell respiration.
• Red blood cells contain a protein called
hemoglobin, which contains iron. Oxygen has
an affinity to iron.
Comparing
Arteries, Veins
& Capillaries
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right ventricle
pulmonary arteries
pulmonary veins
left atrium
left ventricle
right atrium
aorta
inferior vena cava
superior vena cava
tricuspid valve
2 - semi-lunar valve
bicuspid valve
Problems with Blood Vessels
– The Human Digestive System