Relacionar Columnas Human Body Relative SystemsVersión en línea Body Systems por John Schubert 1 2 3 This body system is designed to fight infectious diseases 4 This system sends messages to the brain 5 6 7 This body system helps get liquid waste out of the body. 8 This system sends hormones and messages from the brain Endocrine System Picture Nervous System Immune System Endocrine System Urinary System Picture Immune System Picture Urinary System Nervous System Picture