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

When tissues come together, they form ___________.

• cells
• atoms
• organs
• systems

In multicellular organisms, tissues are comprised of _______.

• organs
• systems
• cells
• blood

The circulatory system uses _________ to deliver oxygen to the rest of the body.

• blood cells
• lungs and nose
• blood vessels
• brain and spinal cord

A(n) _________ is made of small parts connected together to make a whole.

• system
• problem
• evidence
• illustration

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