Body systems

The main purpose of the ____________ system is to break food particles into pieces that can be used.

• circulatory
• respiratory
• digestive
• skeletal

What is responsible for delivering oxygen and removing carbon dioxide from the body?

• cell nucleus
• excretory system
• nervous tissue
• respiratory system

The __________ system directs the body to inner and outer changes.

• digestive
• circulatory
• nervous
• skeletal

The __________ is the main organ of the nervous system.

• heart
• lungs
• brain
• skin

___________ are the building blocks of life.

• cells
• legos
• blocks
• blood

Which of the following body systems work together for support, protection, and movement?

• respiratory and cardiovascular
• skeletal and muscular
• skeletal and integumentary
• digestive and respiratory

Which system provides shape and support, enables you to move, protects your internal organs, and stores minerals?

• skeletal
• muscular
• digestive
• nervous

Which system takes oxygen into the body and eliminates carbon dioxide?

• immune
• nervous
• respiratory
• circulatory

Which system takes food into the body, breaks down food, and absorbs the digested materials?

• respiratory
• circulatory
• digestive
• excretory

Which system is made of the smooth, skeletal, and cardiac muscles?

• skeletal
• muscular
• nervous
• excretory