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Sixth Grade (Grade 6) Respiration, Digestion, and Excretion Questions

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Grade 6 Respiration, Digestion, and Excretion
What is the body system that digests your food? Select all that apply.
  1. GI tract
  2. food canal
  3. gastrointestinal tract
  4. alimentary canal
Grade 6 Respiration, Digestion, and Excretion
                are baglike organs that can be filled with air.
  1. Hearts
  2. Lungs
  3. Vessels
  4. Intestines
Grade 6 Respiration, Digestion, and Excretion
The liver weighs about                 pound(s).
  1. 7
  2. 3
  3. 10
  4. 1
Grade 6 Respiration, Digestion, and Excretion
Why is the left lung a little smaller than the right?
  1. It does not grow as much.
  2. They are the same size.
  3. It makes room for the heart.
  4. The heart is red.
Grade 6 Respiration, Digestion, and Excretion
What organ removes waste and water from the blood?
  1. kidneys
  2. heart
  3. lungs
  4. bladder
Grade 6 Respiration, Digestion, and Excretion
Urine is stored in the                 until you are ready to urinate.
  1. kidneys
  2. garage
  3. bladder
  4. urethra
Grade 6 Respiration, Digestion, and Excretion
When the amount of oxygen in a human being's blood decreases, the body most likely responds to the change by
  1. increasing body metabolism.
  2. decreasing movement.
  3. decreasing blood pressure.
  4. increasing breathing rate.
Grade 6 Respiration, Digestion, and Excretion
The diaphragm is a(n)                 muscle.
  1. voluntary
  2. involuntary
Grade 6 Respiration, Digestion, and Excretion
How many openings does the digestive system of a vertebrate have?
  1. one
  2. two
  3. three
Grade 6 Respiration, Digestion, and Excretion
The small intestine has tiny hairy finger-like structures called
  1. sacs.
  2. villi.
  3. esophagus.
  4. rectum.
Grade 6 Respiration, Digestion, and Excretion
Which action is a form of your body releasing waste?
  1. exhaling
  2. sweating
  3. urinating
  4. all the above
Grade 6 Respiration, Digestion, and Excretion
Lungs contain tiny air-filled sacs called
  1. cartilage.
  2. alveoli.
  3. saliva.
  4. cells.
Grade 6 Respiration, Digestion, and Excretion
What are the main tools for breaking down your food?
  1. hands and feet
  2. teeth, saliva, and tongue
  3. elbows and knees
Grade 6 Respiration, Digestion, and Excretion
Which organ removes unused foods from our bodies as waste?
  1. small intestine
  2. large intestine
  3. stomach
  4. lung
Grade 6 Respiration, Digestion, and Excretion
People breathe in                 and breathe out carbon dioxide.
  1. nitrogen
  2. gas
  3. oxygen
  4. helium
Grade 6 Respiration, Digestion, and Excretion
After the food leaves the mouth, in which organ is it further broken down?
  1. small intestine
  2. liver
  3. stomach
  4. esophagus
Grade 6 Respiration, Digestion, and Excretion
Carbohydrates and fiber ordinarily come from                 sources.
  1. animal
  2. plant
Grade 6 Respiration, Digestion, and Excretion
What substance is evacuated from the colon into the toilet?
  1. chyme
  2. feces
  3. urine
Grade 6 Respiration, Digestion, and Excretion
In which order does air makes its way to the lungs?
  1. nose, bronchi, larynx, pharynx, trachea,
  2. nose, pharynx, larynx, trachea, bronchi
  3. nose, larynx, pharynx, trachea, bronchi
  4. nose, pharynx, trachea, larynx, bronchi
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