Biology Quiz

What is the smallest unit of life in the human body?

• organ

• cell

• body system

• tissue

Which system provides structure and support for the body?

• skeletal

• muscular

• digestive

• excretory

Which system breaks down food?

• excretory

• circulatory

• respiratory

• digestive

Which gas do humans breathe in so our cells can make energy?

• oxygen

• carbon dioxide

• nitrogen

• water vapor

Which system works to transport oxygen and other nutrients throughout the body?

• nervous

• circulatory

• excretory

• muscular

Which system removes waste products from blood?

• circulatory

• digestive

• excretory

• respiratory

Which system protects the body from pathogens?

• circulatory

• immune

• nervous

• skeletal

Which system is the control center of the body?

• immune

• circulatory

• nervous

• muscular

Which system enables movement of the body?

• skeletal

• nervous

• muscular

• respiratory

All of the body systems work together to maintain stability and balance in the body. Another word for this is...

• homeostasis

• hypothesis

• stimulus

• holographic