Matching Pairs Human Body Relative SystemsOnline version Body Systems by John Schubert 1 This body system helps get liquid waste out of the body. 2 3 4 This body system is designed to fight infectious diseases 5 This system sends messages to the brain 6 This system sends hormones and messages from the brain 7 8 Urinary System Picture Nervous System Endocrine System Endocrine System Picture Nervous System Picture Urinary System Immune System Picture Immune System