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Sixth Grade (Grade 6) Circulatory and Immune Systems Questions

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Grade 6 Circulatory and Immune Systems
The eye is the most important organ of the circulatory system.
  1. True
  2. False
Grade 6 Circulatory and Immune Systems
Select all the choices that apply to blood.
  1. is red in color
  2. carries all the other components of the blood
  3. digests food
Grade 6 Circulatory and Immune Systems
Which activity is not a way you can keep your cardiovascular system healthy?
  1. exercise regularly
  2. eat a nutrient-rich, balanced diet
  3. avoid smoking
  4. watch more TV
Grade 6 Circulatory and Immune Systems
Select all the choices that apply to blood plasma.
  1. stops bleeding
  2. contains all the other components of blood
  3. fights infection
  4. is the color of hay
Grade 6 Circulatory and Immune Systems
Snails, insects, and lobsters have closed circulatory systems.
  1. True
  2. False
Grade 6 Circulatory and Immune Systems
Your heart is about the size of your fist.
  1. True
  2. False
Grade 6 Circulatory and Immune Systems
Why is iron important to people?
  1. cleans the unhealthy parts out of the blood
  2. helps make healthy red blood cells
  3. helps your eyesight
Grade 6 Circulatory and Immune Systems
The beating sound of the heart comes from
  1. blood going in the wrong direction.
  2. the valves closing.
  3. the heart skipping beats.
  4. your ears playing tricks on you.
Grade 6 Circulatory and Immune Systems
From what source do cells get their food?
  1. blood
  2. oxygen
  3. other cells
  4. carbon dioxide
Grade 6 Circulatory and Immune Systems
About how many times does your heart beat in a day?
  1. 25,000
  2. 50,000
  3. 100,000
  4. 500,000
  5. 1,000,000
Grade 6 Circulatory and Immune Systems
You can keep your heart strong by
  1. eating heart-shaped candy.
  2. doing activities such as playing outside, riding your bike, and swimming.
  3. sleeping 18 hours a day.
  4. drinking lots of soda.
Grade 6 Circulatory and Immune Systems
The                 let the blood in and out of the heart.
  1. arteries
  2. veins
  3. cells
  4. valves
Grade 6 Circulatory and Immune Systems
What color is oxygenated blood?
  1. red
  2. blue
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