People use the word system to describe certain parts of the body, such as the digestive system and the circulatory system. Write a definition for the word system, and explain why it describes these parts of the body.

Other organs and tissues serve a purpose in only one body system. Examples include the respiratory system, nervous system, and digestive system.

Explanation:

Body systems are groups of organs and tissues that work together to perform important jobs for the body.

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