Which vessels have valves and thin walls?
  • Arteries
  • Veins
  • Capillaries
  • Lymph
Humans have a double circulation system. How many circuits are there in this system?
  • One
  • Two
  • Three
  • Four
Which blood vessels have very thick walls?
  • Arteries
  • Veins
  • Capillaries
  • Lymph
What are the chambers of the heart called?
  • Arteries and veins
  • Arteries and ventricles
  • Atria and ventricles
  • Aorta and vena cava
Cigarette packets contain health warnings. Cigarettes can cause heart attacks when what forms in the coronary artery?
  • Blood clot
  • Blood clog
  • Blood group
  • Blood loss
What are released from white blood cells in order to protect the body from pathogens?
  • Clots
  • Antibodies
  • Antidotes
  • Antigens
The job of heart valves is to prevent what?
  • Flow
  • Back flow
  • Rupture
  • Bleeding
Which type of blood cell carries oxygen?
  • Red blood cells
  • White blood cells
  • Platelets
  • Phloem
Inside which artery would a stent be placed?
  • Aorta
  • Pulmonary
  • Renal
  • Coronary
In which part of the heart does the aorta originate?
  • Left atrium
  • Right atrium
  • Left ventricle
  • Right ventricle
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