explanation of full chapter of bio ch 22 class 11
Answers
Explanation:
animals, control and coordination is performed by neural system and endocrine system jointly. As the nerve fibres do not innervate all cells of the body, the endocrine system is required to coordinate the functions.
Endocrine Glands
Endocrine glands are ductless glands. They release their secretion directly into blood which is then transported to specific target organs to initiate a particular metabolic change.
The endocrine glands secrete chemicals called hormones.
Hormones are non-nutrient chemicals which act as intercellular messengers and are produced in trace amount.
Human Endocrine System
The endocrine glands and hormone producing tissues/cells are located in different parts of the body. Gastrointestinal tract, kidney, liver and heart also produce small quantity of hormones to control and coordinate the function of respective organs.
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