SCIENCE

• Heart pumps blood around the body

  • heart is organ with 4 chambers

  1. blood flows into the two atriumsfrom the vena cava and the pulmonary vein.
  2. the atria pumps blood into the ventricles
  3. blood from the right ventricle goes through the pulmonary artery to the lungs.
  4. blood from the left ventricle goes through the aorta to the rest of the body
  5. the blood then flows to the organs through arteries and return through veins 


  Heart pumps blood around the body
• What is a valve 


  stops the back flow of blood