Introduction
Control and Coordination: The working together
of various organs of an organism in a systematic manner to produce a proper response to a stimulus.
Control: Regulation of a process.
Coordination: Working together of differeWhy Necessary?
Essential for survival, growth, and response to changes in the environment.
Types of Control
Nervous Control: By nerve impulses (fast, short-lived).
Hormonal Control: By chemical messengers called hormones (slow, long-lasting).
Stimulus and Response
Stimulus: Any change in the environment that evokes a response.
Response: The reaction of an organism to a stimulus.
Example: Touching a hot object (stimulus) withdrawing hand (response).nt parts
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