Human Body

Front

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

Back

windpipe

Front

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

Back

immune system

Front

White blood cells help the body by...

Back

destroying and recognizing germs

Front

This system helps get rid of waste products.

Back

digestive system

Front

Cardiac muscle works all the time to...

Back

help your heart beat

Front

This system tells our bodies what to do.

Back

nervous system

Front

The _____ pumps blood to your lungs.

Back

heart

Front

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

Back

skeletal system

Front

Your spinal cord contains thousands of...

Back

nerves

Front

This system moves oxygen around our bodies.

Back

circulatory system