Body System and More

What does the digestive system do?

• Breaks down food into nutrients

• Pumps blood throughout the body

• Helps you breathe

• Helps your arms and legs move

Where does digestion begin?

• mouth
• esophagus
• stomach
• intestines

When you breathe in air, you inhale oxygen into your lungs and exhale ____.

• carbon dioxide
• oxygen
• nitrogen
• carbon monoxide

With circulation, the heart provides your body with which of the following? Choose the best answer. 

• oxygen
• nutrients
• a way to get rid of waste
• all of the above

Each bone has a particular job. What is the job of the skull?

• pumps blood to the brain
  
• protects the brain
  
• helps the body to make decisions
• tells the brain what to do

This system controls everything you do.

• nervous system
• olfactory system
• digestive system
• circulatory system

What body system protects your organs?

• Nervous System
• Cardiovascular System
• Respiratory System
• Skeletal System

Which organs make up the circulatory system?

• the heart, veins, blood vessels

• the brain, spinal cord, and nerves

• the kidneys, bladder, and ureters

• bones

Which two systems work together to maintain homeostasis while transporting oxygen throughout the body and removing carbon dioxide?

• circulatory and respiratory

• respiratory and excretory

• circulatory and digestive

• respiratory and digestive

The ______ system helps you move, protects your organs, gives support to the body, and makes red blood cells.

• skeletal system

• muscular system

• digestive system

• respiratory system