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- 1. Multiple Choice
What is the smallest unit of life in the human body?
organ
cell
body system
tissue
- 2. Multiple Choice
Which system provides structure and support for the body?
skeletal
muscular
digestive
excretory
- 3. Multiple Choice
Which system breaks down food?
excretory
circulatory
respiratory
digestive
- 4. Multiple Choice
Which gas do humans breathe in so our cells can make energy?
oxygen
carbon dioxide
nitrogen
water vapor
- 5. Multiple Choice
Which system works to transport oxygen and other nutrients throughout the body?
nervous
circulatory
excretory
muscular
- 6. Multiple Choice
Which system removes waste products from blood?
circulatory
digestive
excretory
respiratory
- 7. Multiple Choice
Which system protects the body from pathogens?
circulatory
immune
nervous
skeletal
- 8. Multiple Choice
Which system is the control center of the body?
immune
circulatory
nervous
muscular
- 9. Multiple Choice
Which system enables movement of the body?
skeletal
nervous
muscular
respiratory
- 10. Multiple Choice
All of the body systems work together to maintain stability and balance in the body. Another word for this is...
homeostasis
hypothesis
stimulus
holographic
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