Heart and blood vessels

• What type of blood vessel carries blood away from the heart?

  Artery
• Why do arteries have thick muscular and elastic walls?

  To withstand high pressure
• What is the function of veins?

  Carry blood back to the heart
• Why do veins have valves?

  To stop blood flowing the wrong way
• What is the structure of capillaries?

  One cell thick with a very narrow lumen
• Why are capillaries only one cell thick?

  To allow short diffusion distance for substances
• What type of tissue is the heart made from?

  Cardiac muscle tissue
• Which artery supplies the heart with oxygen?

  Coronary artery
• What is the function of the right atrium?

  Brings deoxygenated blood into the heart
• What is the function of the left ventricle?

  Pumps blood around the body
• What controls the heart rate?

  A group of cells in the right atrium
• What is an artificial pacemaker used for?

  To control irregular heartbeats
• What is the double circulatory system?

  Blood passes through the heart twice for every circuit around the body
• Why is the human circulatory system described as a double circulatory system?

  Because blood passes through the heart twice for every circuit around the body
• Which ventricle pumps blood to the lungs?

  Right ventricle
• Which ventricle pumps blood around the rest of the body?

  Left ventricle
• What are the key differences between arteries, veins, and capillaries?

  • Arteries: Thick muscular and elastic walls, carry blood away from the heart
  • Veins: Thin walls, large lumen, have valves, carry blood back to the heart
  • Capillaries: One cell thick, very narrow lumen, allow for short diffusion distance
• What are the main components of the double circulatory system?

  • Right ventricle pumps blood to the lungs
  • Left ventricle pumps blood around the rest of the body
  • Blood passes through the heart twice for every circuit around the body
• What are the key terms related to the circulatory system?

  • Alveoli
  • Amylase
  • Aorta
  • Artery
  • Atrium
  • Bronchi
  • Bronchiole
  • Capillary
  • Cardiac
  • Coronary
  • Double circulatory system
  • Lipase
  • Organ
  • Organ system
  • Plasma
  • Platelet
  • Protease
  • Pulmonary
  • Tissue
  • Vein
  • Vena cava
  • Ventricle
• What is the function of the pulmonary artery?

  Takes oxygenated blood to the lungs
• What is the function of the pulmonary vein?

  Brings oxygenated blood from the lungs
• What is the function of the aorta?

  Carries oxygenated blood around the body
• What is the function of the vena cava?

  Brings deoxygenated blood into the heart
• What is the function of the right ventricle?

  Pumps blood to the lungs
• What is the function of the left atrium?

  Brings oxygenated blood from the lungs
• What is the function of the left ventricle?

  Pumps blood around the body
• What is the function of the right atrium?

  Brings deoxygenated blood into the heart