circulatory system

• What is the role of the circulatory system?

  To transport oxygen and nutrients to the body's tissues
• What are the three main components of the circulatory system?

  The blood, blood vessels, and heart
• How does the heart function in the circulatory system?

  The heart pumps blood to keep it moving through the vessels
• What is the structure of the circulatory system?

  • Composed of blood, blood vessels, and heart
  • Blood carries oxygen and nutrients
  • Blood vessels hold blood
  • Heart pumps blood
• What is meant by a double circulatory system?

  It consists of two distinct loops: one for deoxygenated blood to the lungs and one for oxygenated blood to the body
• What happens to deoxygenated blood in the circulatory system?


  It is carried from the heart to the lungs to gain oxygen
• How many chambers does the heart have?

  Four chambers
• What are the names of the top and bottom chambers of the heart?

  The top chambers are called atria and the bottom chambers are called ventricles
• What is the function of the valves in the heart?


  To prevent blood from flowing backwards
• What is the path of blood flow through the heart?

  Blood flows into the heart via the vena cava and pulmonary vein, into the atria, then into the ventricles, and out through the pulmonary artery and aorta
• What is the role of the pacemaker cells in the heart?

  They produce electrical impulses that cause the heart to contract
• What happens if the pacemaker cells do not function properly?

  Doctors can implant an artificial pacemaker to regulate heart contractions
• What is the definition of an artery?

  An artery is any vessel that carries blood away from the heart
• Why might students confuse arteries and veins?

  Because arteries usually carry oxygenated blood and veins usually carry deoxygenated blood, but this is not always the case
• What is the function of the coronary arteries?

  To supply oxygenated blood to the heart muscle
• What are the key components of the circulatory system?

  • Blood: carries oxygen and nutrients
  • Blood vessels: hold and transport blood
  • Heart: pumps blood
  • Double circulatory system: two loops for oxygenated and deoxygenated blood
• How does the structure of the heart support its function?

  • Four chambers: separate oxygenated and deoxygenated blood
  • Thick muscular walls: enable strong contractions
  • Valves: ensure unidirectional blood flow
  • Pacemaker cells: regulate heart rhythm