Body Systems

The smallest unit that is a building block for all life.

• tissue
• organelle
• cell
• molecule

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Urine is one way that our body gets rid of ___________.

• pee
• liquids
• waste
• carbon dioxide

This tube is made of smooth muscle and carries food from your mouth to your stomach.

• trachea
• intestines
• esophagus
• urethra

Your body couldn’t breathe without this system. Which one is it?

• circulatory
• skeletal
• respiratory
• urinary

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When you breathe in air, you inhale oxygen into your lungs and exhale ____.

• carbon dioxide
• oxygen
• nitrogen
• carbon monoxide

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The organ of the respiratory system where the gas exchange takes place is called ______.

• stomachs

• brains

• lungs

• nerves

With circulation, the heart provides your body with which of the following? Choose the best answer. 

• oxygen
• nutrients
• a way to get rid of waste
• all of the above

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NGSS.MS-LS1-3

Where is urine PRODUCED?

• intestines
• kidneys
• bladder
• blood

Urine is stored in this organ.

• kidney
• bladder
• peeing bag
• intestines

Each bone has a particular job. What is the job of the skull?

• pumps blood to the brain
  
• protects the brain
  
• helps the body to make decisions
• tells the brain what to do

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