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Fourth Grade (Grade 4) Respiration, Digestion, and Excretion Questions

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Grade 4 Respiration, Digestion, and Excretion
Food gives us
  1. energy.
  2. sunlight.
  3. oxygen.
  4. all of the above
Grade 4 Respiration, Digestion, and Excretion
Your heart and                 work together to supply your body with oxygen and remove carbon dioxide from your body.
  1. stomach
  2. fist
  3. lungs
  4. brain
Grade 4 Respiration, Digestion, and Excretion
Your respiratory system helps you
  1. move.
  2. breathe.
  3. digest food.
Grade 4 Respiration, Digestion, and Excretion
Food the body cannot use is stored in the
  1. stomach.
  2. large intestine.
  3. mouth.
  4. small intestine.
Grade 4 Respiration, Digestion, and Excretion
Where does digestion start?
  1. mouth
  2. small intestine
  3. large intestine
  4. stomach
Grade 4 Respiration, Digestion, and Excretion
What does your body need that it gets from air?
  1. carbon dioxide
  2. oxygen
  3. nitrogen
Grade 4 Respiration, Digestion, and Excretion
This substance, also known as "spit," is in your mouth to help break up food.
  1. medicine
  2. salt
  3. taste buds
  4. saliva
Grade 4 Respiration, Digestion, and Excretion
Which part of the digestive system makes food mostly liquid?
  1. stomach
  2. esophagus
  3. small intestine
  4. large intestine
Grade 4 Respiration, Digestion, and Excretion
What do the respiratory and the circulatory systems work together to do?
  1. deliver calcium to the bones
  2. deliver blood to your lungs
  3. deliver oxygen and nutrients to cells throughout the body
Grade 4 Respiration, Digestion, and Excretion
Your food passes through your mouth and esophagus before it reaches your stomach.
  1. True
  2. False
Grade 4 Respiration, Digestion, and Excretion
After your kidneys make urine, it is sent to your
  1. liver.
  2. colon.
  3. bladder.
  4. gallbladder.
Grade 4 Respiration, Digestion, and Excretion
When the stomach has digested the food, where does the food move next?
  1. small intestine
  2. large intestine
  3. bladder
  4. kidneys
Grade 4 Respiration, Digestion, and Excretion
The organ that allows you to breathe is the
  1. heart.
  2. legs.
  3. lungs.
  4. eyes.
Grade 4 Respiration, Digestion, and Excretion
Where does the last step of digestion occur?
  1. mouth
  2. stomach
  3. small intestine
  4. large intestine
Grade 4 Respiration, Digestion, and Excretion
When you exercise, your body needs more                , so you breathe faster.
  1. oxygen
  2. water
  3. carbon dioxide
  4. speed
Grade 4 Respiration, Digestion, and Excretion
What does saliva do? (Select all that apply.)
  1. causes mechanical digestion
  2. causes chemical digestion to occur
  3. makes food soft and easier to swallow
Grade 4 Respiration, Digestion, and Excretion
Your body has two                 to help you breathe.
  1. tongues
  2. mouths
  3. stomachs
  4. lungs
Grade 4 Respiration, Digestion, and Excretion
Oxygen moves from the lungs into the blood vessels.
  1. True
  2. False
Grade 4 Respiration, Digestion, and Excretion
If part of the liver is removed, it can grow back.
  1. True
  2. False
Grade 4 Respiration, Digestion, and Excretion
The main function of taste is to
  1. make you happy.
  2. encourage the body to start the digestive process.
  3. break down food.
  4. keep you from eating things you do not like.
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