Blood Vessels

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Blood Vessels

• To be used with Circulatory System Guided Notes
• Gaccione/Bakka
• Belleville High School

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Blood vessels - Arteries

• 1. Thick walled very muscular.
• 2. Carries oxygenated blood away from the heart.
• 3. Under great pressure.
• 4. Blood pressure (120/80)
• 5. Pulse rate (70 per minute)is taken from the
  arteries.
• 6. Aorta - largest artery

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Blood vessels - Veins

• Thin walled flaccid.
• Under low pressure.
• Contains one way valve
• that prevent backflow of blood.
• 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.

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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

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Treatment

• Self awareness
• Avoid excess amounts of standing
• Elevate legs
• Wear compression stockings
• Exercise - improves muscle tone
• Lose weight

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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.

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Veins (continued) 1. One way valves prevents
back flow of blood.2. Lack of oxygen gives
veins its blue color.
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Blood vessels - Capillaries

• 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.

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Capillaries in the Lungs

• Found where arteries end and veins begins.
• Surrounds aveolus/aveoli (air sacs in the lungs).
• Exchanges oxygen for carbon dioxide.

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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.

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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

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Problems with Blood Vessels

• The Human Digestive System