Circulatory system

• Heart

  Acts as a pump to propel blood around the circulatory system
• Components of the circulatory system

  • Blood
  • Blood vessels
  • Heart
• Blood

  • Carries oxygen and nutrients
  • Transports around the body
• Blood vessels


  • Carry and transport blood
• Gas exchange


  1. Oxygen is taken from the air and diffuses to the bloodstream in the lungs

  2. Carbon dioxide is removed from the body
• Organs involved in the circulatory system

  • Lungs
  • Heart
  • Liver
  • Intestine
  • Kidney
  • Legs
• Digestion

  Nutrients (glucose) are absorbed into the bloodstream in the small intestine
• Circulatory system


  Transports nutrients (glucose) around the body
• Respiratory system


  Supplies oxygen
• Heart

  • Contains valves to prevent blood from flowing backwards
• Blood flow through heart

  1. Blood flows from lungs to left atrium

  2. Through bicuspid valve to left ventricle

  3. Out through aorta
• Plasma


  Main function is to transport nutrients, waste, and regulate body temperature
• Red blood cells


  • Transport oxygen around the body
• White blood cells


  • Protect against infection
• Platelets


  • Help prevent blood loss by forming blood clots
• Blood vessels


  • Arteries
  • Veins
  • Capillaries
• Arteries


  Carry blood away from the heart
• Veins


  Carry blood back to the heart
• Capillaries


  Thin blood vessels that bring oxygen and nutrients into cells and remove waste