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Eighth Grade (Grade 8) Circulatory and Immune Systems Questions

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Grade 8 Circulatory and Immune Systems
Which is the site where oxygen diffuses into the blood?
  1. trachea
  2. bronchus
  3. alveoli
  4. bronchiole
Grade 8 Circulatory and Immune Systems
What is carried around the body in arteries?
  1. deoxygenated blood at high pressure
  2. deoxygenated blood at low pressure
  3. oxygenated blood at high pressure
  4. oxygenated blood at low pressure
Grade 8 Circulatory and Immune Systems
What is the function of valves in the heart and veins?
  1. to speed up blood flow
  2. to slow down blood flow
  3. to keep blood flowing in the same direction
  4. to increase the amount of oxygen around the body
Grade 8 Circulatory and Immune Systems
What is the function of red blood cells?
  1. carry oxygen around the body
  2. carry carbon dioxide around the body
  3. to fight infections
  4. to clot blood
Grade 8 Circulatory and Immune Systems
Which side of the heart receives deoxygenated blood from the rest of the body?
  1. right atrium
  2. left atrium
  3. right ventricle
  4. left ventricle
Grade 8 Circulatory and Immune Systems
Which statement best describes veins?
  1. high pressure, elastic walls, takes blood away from the heart
  2. low pressure, thin walls, takes blood back to the heart
  3. high pressure, thin walls, takes blood back to the heart
  4. low pressure, elastic walls, takes blood away from the heart
Grade 8 Circulatory and Immune Systems
Grade 8 Circulatory and Immune Systems
Which of these is not found in human blood?
  1. red blood cells
  2. platelets
  3. plasma
  4. chloroplasts
Grade 8 Circulatory and Immune Systems
Why are capillaries much thinner than other blood vessels?
  1. to withstand blood under high pressure
  2. to allow oxygen and food to move from the blood to cells
  3. to speed blood up when exercising
  4. to prevent blood from flowing backwards
Grade 8 Circulatory and Immune Systems
Grade 8 Circulatory and Immune Systems
What is the correct sequence for the path of blood through the body?
  1. heart, lungs, other body parts
  2. heart, lungs, brain
  3. heart, lungs, heart, other body parts
  4. heart, other body parts, lungs, heart
Grade 8 Circulatory and Immune Systems
What do red blood cells not do?
  1. Carry oxygen.
  2. Carry food and nutrients.
  3. Take carbon dioxide or waste away.
  4. Fight germs.
Grade 8 Circulatory and Immune Systems
Grade 8 Circulatory and Immune Systems
Haemophilia is a disorder that reduces the number of platelets in the blood. Why do people affected by haemophilia have to be careful to avoid injuries?.
  1. because their blood cannot carry enough oxygen
  2. because their blood cannot remove carbon dioxide fast enough
  3. because their immune system is very low and cannot fight infections
  4. because their blood cannot clot so they will not stop bleeding
Grade 8 Circulatory and Immune Systems
The aorta is                              .
  1. the largest vein in the body
  2. a chamber of the heart
  3. the largest artery in the body
  4. a misspelled word
Grade 8 Circulatory and Immune Systems
What produces antibodies?
  1. T cells
  2. phagocytes
  3. B cells
  4. pathogens
Grade 8 Circulatory and Immune Systems
Grade 8 Circulatory and Immune Systems
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