The Heart

• 1. The main function of the heart is to pump blood into the blood vessels to move around the body,
  2. The heart is a double pump because of the double circulatory system, The oxygenated and deoxygenated blood flowing throughout the body.
  3. The top chambers are called the Atrias
  4. The bottom chambers are called the Ventricles
  5. They are the pulmonary valves
  6. They are the Vena Cava
  7. The heart has valves to prevent the blood from flowing back into the heart when it stops beating
  8. The left hand side of the heart pumps the blood to the rest of the body opposed to the right hand side pumping it to the lungs.
• The right ventricle pumps deoxygenated blood to the lungs.
• The left ventricle pumps oxygen-rich blood to the rest of the body.
• The left ventricle pumps oxygenated blood to the rest of the body
• The heart beats about 70 times per minute
• The ventricles send blood out of the heart through arteries
• The heart rate decreases during sleep as less oxygen is required by our bodies
• The heart is made up of four chambers - two atria (top) and two ventricles (bottom)
• The atria contract first then the ventricles
• The atria receive blood from veins, which are low pressure vessels
• The ventricles pump blood into high pressure vessels (arteries)
• The atria receive blood coming into the heart through veins
• Oxygenated blood comes back to the left atrium via pulmonary vein
• Blood flows from the vena cava to the right atrium
• The valves prevent backflow of blood
• Blood flows out of the atria into the ventricles
• Oxygenated blood enters the heart via pulmonary vein