Life Science Body Systems

Sam began to eat a cookie at lunch. His class had just completed a science lesson about the digestive system. Sam learned that the digestion of his cookie began in the mouth. The cookie is first broken down by _______ in Sam's mouth.

• acids and churning

• capillaries

• saliva and chewing

• cartilage

The esophagus muscles move _________ into the stomach.

• blood

• oxygen and carbon dioxide

• cartilage

• food and liquid

Tags

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These are all major parts of the _________ system.

• digestive

• excretory

• respiratory

• nervous

The function of the excretory system is to rid the body of ________.

• blood

• oxygen

• carbon dioxide

• waste products

The skeletal muscles found in your leg function differently than the heart muscle by ____________.

• pumping blood faster

• being involuntary and moving on their own

• being voluntary and moving when you want them to move

• not moving at all

The difference between voluntary and involuntary muscles is that _____________.

• involuntary muscles keep working without you thinking about them

• voluntary muscles work on their own without you thinking about them

• involuntary muscles move when you think about them

• voluntary muscles are never strong

The __________ system provides movement for the body.

• circulatory

• digestive

• muscular

• excretory

Amanda suddenly woke up and smelled something burning. She crept down the stairs to see what was happening. She found her parents reading and sitting by the fireplace, which was burning wood. Why did Amanda wake up?

• The smell of the fire sent a signal through her blood cells to her brain and she woke up.

• The smell of the fire sent a signal through her nerves to her brain and she woke up.

• Amanda's nose was stuffy from a cold and she could not sleep.

• Amanda was too cold upstairs to sleep.

Tags

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Arteries and veins branch out into ________, the smallest blood vessels.

• nerves

• capillaries

• organelles

• organs

Arteries carry blood away from the ________, as the blood is moved to the rest of the body.

• lungs

• kidneys

• heart

• brain