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Chemical coordination is centered in system of glands known as endocrine glands.

The glands secrete hormones , a series of chemical substances composed of protein or sterols.

Hormones bring about changes that results in coordination between body systems.

Thyroxine hormone is secreted by thyroid gland that regulates overall body metabolism.

Pancreas secrete insulin which facilitates passage of glucose into all body cells for use in energy metabolism.

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