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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
The           stomach          and small intestine work together to break down the food we eat.
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
The longest organ in your body, that is filled with villi and where you digest food is the                   small intestine                  .
Grade 4 Respiration, Digestion, and Excretion
          Kidneys           are two small organs that clean out your blood.
Grade 4 Respiration, Digestion, and Excretion
       Acid        is a dangerous chemical inside your stomach that kills bacteria in your food.
Grade 4 Respiration, Digestion, and Excretion
Organs that allow you to breathe
  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 the stomach has digested the food, where does it send it?
  1. small intestine
  2. large intestine
  3. bladder
  4. kidneys
Grade 4 Respiration, Digestion, and Excretion
Your body has 2                 to help you breathe.
  1. tongue
  2. mouth
  3. stomach
  4. lungs
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                 helps you breathe.
  1. Lungs
  2. Tongue
  3. Stomach
Grade 4 Respiration, Digestion, and Excretion
What does saliva do?
  1. causes mechanical digestion
  2. causes chemical digesion to occur and create a new substance
  3. makes food soft and easier to swallow
Grade 4 Respiration, Digestion, and Excretion
Organs that work together to take air into the body and push it back out make up the                       respiratory system                       
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
            The liver            are the largest internal organ in the body.
Grade 4 Respiration, Digestion, and Excretion
Food the body can't use is stored in the                .
  1. stomach
  2. large intestine
  3. mouth
  4. small intestine
Grade 4 Respiration, Digestion, and Excretion
A healthy lung is pink, smooth and shiny.
  1. True
  2. False
Grade 4 Respiration, Digestion, and Excretion
Where does digestion start?
  1. in your mouth
  2. in your small intestine
  3. in your large intestine
  4. in your stomach
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