Circulatory System- The Heart

• What are the upper chambers of the heart called?

  Atriums
• What are the lower chambers of the heart called?

  Ventricles
• Does the right side of the heart contain oxygenated or deoxygenated blood?

  Deoxygenated blood
• Does the left side of the heart contain oxygenated or deoxygenated blood?

  Oxygenated blood
• What are the walls of the heart made of?

  Muscle tissue
• What structures ensure blood flows in one direction through the heart?

  Valves
• What are coronary arteries?

  Arteries which branch off the aorta to deliver oxygenated blood to the cells around the heart
• Which blood vessel carries deoxygenated blood from the body to the heart?

  The vena cava
• Which blood vessel carries deoxygenated blood from the heart to the lungs?

  The pulmonary artery
• Which blood vessel carries oxygenated blood from the lungs to the heart?

  The pulmonary vein
• Which blood vessel carries oxygenated blood from the heart to the body?

  The aorta
• What is a pacemaker?

  A group of cells controlling your resting heart rate by producing a small electric impulse causing the heart muscles to contract
• Where are the pacemaker cells located in the heart?

  In the right atrium