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COMPREHENSIVE NOTES OF THE ENDOCRINE SYSTEM
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Notes describing the endocrine system
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ENDOCRINOLOGY,Introduction
Control of the internal environment by long-
distance signaling is the role of both nervous and
endocrine systems.
Nerves can operate rapidly and precisely
Endocrine system operates more slowly, but it can
generate similarly precise responses.
Both systems use chemical signals to bring about a
desired response in some target, perhaps a muscle
(in the case of the nervous system) or the liver (in
the case of the endocrine system).
, Further, the two systems interact closely and control
each other so that endocrine organs may be the target
of the CNS and vice versa.
The CNS, in general, controls its targets by sending it
messages along motor neurons.
The nervous system delivers signals, or messages, via
neurotransmitters to specific targets (usually).
, The endocrine system consists of cells, tissues, and
glands.
It controls a myriad of target organs throughout the body
by sending its own messages, usually using the blood
vascular system to accomplish delivery.
The endocrine system delivers signals by a much more
general distribution system. It does not use ducts.
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