Front

A ____________ is the basic unit of structure and function for all living things.

Back

cell

Front

A/an ___________________ is a group of tissues that work together to perform a specific job.

Back

organ

Front

What kind of tissue makes your body move?

Back

muscle tissue

Front

Which body system is responsible for making us breathe?

Back

respiratory system

Front

The main function of the respiratory system is to take in ______________ through the lungs and get rid of carbon dioxide and water.

Back

oxygen

Front

The excretory system helps ___________ wastes in the body.

Back

get rid of

Front

Which organ helps break down wastes into forms that can be excreted and recycles materials?

Back

liver

Front

Which body system eliminates pathogens and sicknesses from invading the body?

Back

immune system

Front

All of these are layers of the immune system EXCEPT: breathing passages, mouth, stomach, skin, heart

Back

heart

Front

The brain is the main organ that is part of the _____________ system.

Back

nervous system