Human Body

When we breathe in, air first moves down the...

• lungs

• windpipe

• tibia

• spleen

This system helps keep our bodies healthy by fighting off sickness.

• circulatory system

• skeletal system

• digestive system

• immune system

White blood cells help the body by...

• digesting food

• destroying and recognizing germs

• moving our muscles

• send oxygen throughout the body

This system helps get rid of waste products.

• muscular system

• immune system

• digestive system

• circulatory system

Cardiac muscle works all the time to...

• help you blink

• swallow food

• carries blood

• help your heart beat

Tags

NGSS.MS-LS1-3

This system tells our bodies what to do.

• nervous system

• circulatory system

• respiratory system

• skeletal system

The _____ pumps blood to your lungs.

• A. liver

• B. veins

• C. heart

• D. neurons

This system helps to keep our bodies upright and protect our organs.

• A. muscular system

• B. digestive system

• C. respiratory system

• D. skeletal system

Your spinal cord contains thousands of...

• A. bones

• B. muscles

• C. nerves

• D. ligaments

This system moves oxygen around our bodies.

• A. circulatory system

• B. respiratory system

• C. nervous system

• D. immune system