Cardiovascular System

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Cardiovascular System
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Fun Facts!!!

• If we looked at all the blood vessels in your
  body, what would the total length be?
• Around the world twice!
• How many times will your heart beat in a
  lifetime?
• 3 billion!!

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• 1. Function of CV system
• Provides nutrients and oxygen through blood
• Carries away waste
• Helps fight disease

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• 2. The CV system consists of three main parts
• Heart
• Blood
• Blood vessels

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• 3. The Heart
• Consists of 4 chambers
• Atria top 2 chambers
• Ventricles bottom 2 chambers
• Valves between the chambers allow the blood to
  flow through

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• 4. Blood
• Delivers O2, and nutrients to cells and carries
  away wastes
• Composed of
• Plasma watery fluid (about 55)
• Red blood cells contain hemoglobin which
  carries O2
• White Blood cells protect body against disease
• Platelets help blood clot

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• 5. Blood Vessels 3 types
• Artery
• Carries oxygenated blood AWAY from the heart
• Veins
• Return blood TO the heart
• Capillaries
• Very small vessels that connect arteries to veins

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Lets see how the heart works

• Pathway of Blood

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Pathway of Blood Through the Heart

• 1. Blood enters heart through superior and
  inferior vena cava
• 2. The blood enters the right atrium
• 3. The tricuspid valve opens and blood flows into
  the right ventricle
• 4. From here, blood is pumped from the right
  ventricle to the pulmonary artery.

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Pathway of Blood Through the Heart

• 5. The pulmonary artery leads to the lungs. Here
  blood picks up oxygen.
• 6. Oxygen rich blood returns to your heart
  through pulmonary veins
• 7. Blood enters left atrium
• 8. Through the mitral (bicuspid valve)
• 9. Into the left ventricle.

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Pathway of Blood Through the Heart

• 10. From here, blood is pumped from the heart
  through the aorta the largest artery in your
  body!
• Lets watch it again
• Pathway of Blood