Circulatory, Respiratory, and Nervous Systems

Which is the primary organ of the Respiratory System?

• Bronchioles

• Lungs

• Bronchi

• Trachea

How many lungs do you have in your body?

• 1

• 2

• 3

• 4

When we breathe in , oxygen enters the body through our mouth or ............

• ears

• nostrils

Which one is your lungs?

• 
• 

This keeps your lungs safe___________

• skull

• femur

• rib cage

Another word for your windpipe is your___________

• trachea

• leg

What is the main organ of our circulatory system?

• heart

• skin

The heart is about the size of your ________.

• brain

• fist

What does your heart do?

• pumps blood through your body

• protects your body

• helps your exercize

The _____________ system flows blood through the body.

• respiratory

• circulatory

• digestive

• endocrine